Database Develop

battery charger?

power saving battery charger:
I want to buy this battery charger,
because I've buyed my HD2 from GB (I live in Germany)
and the plug doesn't fit
But I have some doubt about the specs:
ORG: 5V, 1000 mA
this: 5V, 1200 mA
will this make problems?

Sure this would be fine!

Should work fine. If it doesn't fit try finding an adapter. They aren't expensive these days.

Doesn't it matter what the power output is for the charger? The mah rating, or anything or are you guys just saying that any charger with a micro usb on the end will work and that the phone itself will regular the power?

Your phone needs 1000mA minimum, 1200mA is 20% better It will work very well with your HD2. If you don't like it, pass it on please, I'll take it off your hands

atomic_dude said:
Your phone needs 1000mA minimum, 1200mA is 20% better It will work very well with your HD2. If you don't like it, pass it on please, I'll take it off your hands
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That's not correct, you shouldn't really be going over 1000mA, I got a micro usb charger off eBay for 1.75GBP and its rating is 650mA and it works fine.

So you can safely charge your phone with a 700 mah rating, and it will just charge slowly but will not negatively affect the battery life longevity or harm the phone correct?
One person said it has to be a minimum of 1000 mah, so that makes me worried of going below and using a 500 mah and having my battery get screwed up, or the unit blow up.

Free Man said:
One person said it has to be a minimum of 1000 mah, so that makes me worried of going below and using a 500 mah and having my battery get screwed up, or the unit blow up.
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Used my cheap ebay USB wall charger rated 500 mAh... worked for a week, now it's dead..just wouldn't charge anymore. Good thing the charger didn't blow up..lol

Free Man said:
So you can safely charge your phone with a 700 mah rating, and it will just charge slowly but will not negatively affect the battery life longevity or harm the phone correct?
One person said it has to be a minimum of 1000 mah, so that makes me worried of going below and using a 500 mah and having my battery get screwed up, or the unit blow up.
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You can go below with no problems but there will be a minimum amount the phone will need to charge. My post above was incorrect about the charger i got, its 550Mah not 650Mah and still going strong. When purchasing chargers off Ebay i always buy from my home country, that way if anything untoward goes wrong i can go knocking on their door!

on chargers
what u guys should watch out for is the voltage not maH. 5V is what we need to pay attention to. If you use a higher voltage the battery will explode.
The difference between 550 mAH or 1200 mAH is the charging time. With 1200mAH your phone will charge quicker vs the 550mAH. Just think of it that you are trying to fill a pail with water. 550mAH is like using a small straw. 1200 mAH is like using a big pipe.
Hope this helps

greatestkelvin said:
what u guys should watch out for is the voltage not maH. 5V is what we need to pay attention to. If you use a higher voltage the battery will explode.
The difference between 550 mAH or 1200 mAH is the charging time. With 1200mAH your phone will charge quicker vs the 550mAH. Just think of it that you are trying to fill a pail with water. 550mAH is like using a small straw. 1200 mAH is like using a big pipe.
Hope this helps
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This has been the most useful post in this thread thanks....
So, I have a Motorola charger for my BT headset that is rated 5V and 550mAH... I assume I can charge my phone with this safely without any adverse effect on the battery (just a slower charge)?
Makes sense as I think charging VIA usb cable and a laptop also takes longer... This would be great as I have a few of those motorola chargers lying around and won't mind using them for bedside overnight charging... it will free up another micro USB cable for me
I am assuming it will be ok cause USB charging from laptops/computers are about 4.7V at 500mah.... This means this little charger should be ok I think... I have ALWAYS left my phones connected for long periods of time to laptops/PCs... does not seem to affect battery lifespan. Can anyone confirm this or tell me differently?

im the "drop out"
yep looks like im the "drop out" i got coming from HK its only 350mA and even befor it arrive i look for another.
I see espansys have one 1500ma AC Adaptor but very expensive > but i suppose if want battery to last > good to get

So, I used my Motorola charger for my HX1 bluetooth headset to charge my phone overnight (with phone on). The only thing running was SPB time with an animated background.... The charger is rated 5V 550Mah..... all seemed to be fine at the begining.
However, this morning, I work up to a blank screen and the fully charged LED on. Even after unplugging, the LED stayed on and the phone was unresponsive. I had to remove the cover and pull out the battery to restart. I am wondering if it was the charger or perhaps SPB time? I will give it another go tonight without SPB Time v3.1.1 running to see if it does the same. I hope Im not destroying my battery!
Edit: I charged it last night from 5% till full with no SPB time running... no problems cool!

Battery to 100% - Required Parts

First post here, be easy on me. I love this Nexus S, my first android phone, but man this battery issue has really bothered me. I would wake up in the morning, take my phone off the charger and immediately be at 96%. After 15 minutes of checking emails and surfing, I would be below 90% by the time I got to work an hour later. I was spending half the day charging my battery, so I decided to order 2 OEM batteries and a wall charger off Ebay.
Well little I did I know that this would solve two problems. First, the wall charger charges the batteries to 100% and provides significantly more life. For some reason the phone does not let the battery truly get to 100%. Second, when I get home from work or wherever, I can just pop in another battery and be fully charged again. Now I don't have to sit and worry about charging my battery all the dang time, and my batteries are lasting much longer to boot using the wall charger. I am not sure I can post links yet, so what I ordered was an M9P wall charger for like $10 and a couple extra OEM batteries for $10/per on Ebay. I ordered from US sellers so I didnt have to wait weeks also. You might be able to find cheaper if you order from a hong kong seller. Anyway, I hope this helps someone as frustrated as me.

This has been posted MANY MANY times.
http://forum.xda-developers.com/showthread.php?t=882679
No trickle charge is applied because lithium-ion is unable to absorb overcharge. A continuous trickle charge above 4.05V/cell would causes plating of metallic lithium that could lead to instabilities and compromise safety. Instead, a brief topping charge is provided to compensate for the small self-discharge the battery and its protective circuit consume. … Typically, the charge kicks in when the open terminal voltage drops to 4.05V/cell and turns off at a high 4.20V/cell.
There is a whole lot more info on that site, but I’ll sum up the excerpt, if you continually charge a Lithium Ion battery, it will degrade, and worst case explode, but hey, at least it looks cool when it does.
Just don’t end up like others have, for example, a Chinese man who took his phone off the charger, put it in his pocket, and then it exploded. To read a little more about that, check out EnGadget, if you want to see the phone, Tech-Ex. Here’s another one, no one was killed, but it burst into flames, over on PCWorld.
http://www.ziggy471.com/2011/01/02/overcharging-batteries/
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IMO. I rather have it sit at 95% than to have my phone catch on fire. Better safe than sorry.

I've been charging my mobile devices to 100% for years with no issues. I'm not too worried about it since I don't mod my phone. All I wanted to do was have a battery that lasts and I now have that. Thank you.

turbodroid said:
First, the wall charger charges the batteries to 100% and provides significantly more life.
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Have you actually measured this, or is it just a "gut feeling"?
Now I don't have to sit and worry about ...
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There's an app medication for that ...

in the end charging via USB/PC gets a fuller charge because its more of a trickle, though it can be dangerous

shrivelfig said:
Have you actually measured this, or is it just a "gut feeling"?
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The battery level reads a full 100% when I plug the fully charged battery in. I just changed battery again this morning.

slowz3r said:
in the end charging via USB/PC gets a fuller charge because its more of a trickle, though it can be dangerous
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From what I am seeing and how much longer my battery is lasting, I am getting a fuller charge and WAY longer battery life charging batteries in the wall charger. I had the same issue as many others with this phone. The battery wouldn't charge to 100% and general battery life is pretty poor. I thought my phone was bad so I exchanged it and the battery life was identical.
I recommend everyone who questions my results, if you have a spare $20 and are sick of the poor battery performance of this phone to get a wall charger and spare OEM battery off Ebay or wherever. Theories are nice and everyone has one but I'll take real world results over theories any day.

turbodroid said:
First post here, be easy on me. I love this Nexus S, my first android phone, but man this battery issue has really bothered me. I would wake up in the morning, take my phone off the charger and immediately be at 96%. After 15 minutes of checking emails and surfing, I would be below 90% by the time I got to work an hour later. I was spending half the day charging my battery, so I decided to order 2 OEM batteries and a wall charger off Ebay.
Well little I did I know that this would solve two problems. First, the wall charger charges the batteries to 100% and provides significantly more life. For some reason the phone does not let the battery truly get to 100%. Second, when I get home from work or wherever, I can just pop in another battery and be fully charged again. Now I don't have to sit and worry about charging my battery all the dang time, and my batteries are lasting much longer to boot using the wall charger. I am not sure I can post links yet, so what I ordered was an M9P wall charger for like $10 and a couple extra OEM batteries for $10/per on Ebay. I ordered from US sellers so I didnt have to wait weeks also. You might be able to find cheaper if you order from a hong kong seller. Anyway, I hope this helps someone as frustrated as me.
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Battery life is actually pretty good on this phone. Try owning the evo. I never seen a phone with worst battery life.

turbodroid said:
From what I am seeing and how much longer my battery is lasting, I am getting a fuller charge and WAY longer battery life charging batteries in the wall charger. I had the same issue as many others with this phone. The battery wouldn't charge to 100% and general battery life is pretty poor. I thought my phone was bad so I exchanged it and the battery life was identical.
I recommend everyone who questions my results, if you have a spare $20 and are sick of the poor battery performance of this phone to get a wall charger and spare OEM battery off Ebay or wherever. Theories are nice and everyone has one but I'll take real world results over theories any day.
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Hey Turbodroid,
Can't find this wall charger of which you speak. If you can't post a link, please give more info on it so I can search for it. That and the batteries as well.
Thanks

ClrDaLane said:
Hey Turbodroid,
Can't find this wall charger of which you speak. If you can't post a link, please give more info on it so I can search for it. That and the batteries as well.
Thanks
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I can't post links yet, but I sent you a PM. On Ebay, search for M9P Charger and the only result that comes up is the one you want. Then search for OEM Battery Nexus S and pick whatever one you want.
EDIT - Here are the links I used
Charger - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150546613705&ssPageName=STRK:MEWNX:IT
OEM Battery - http://cgi.ebay.com/NEW-OEM-GENUINE...199674?pt=PDA_Accessories&hash=item20b6d2767a

turbodroid said:
From what I am seeing and how much longer my battery is lasting, I am getting a fuller charge and WAY longer battery life charging batteries in the wall charger.
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"WAY longer battery life"? Really really? I'm having some trouble believing this. The standard battery is 1500mAh. Are the extra batteries the same capacity? Because we are talking about something around 4-6% more power here.
This is either confirmation bias or blatant advertising.
Edit:
Fun fact: These two listings are from different sellers, but both write "Samusng" instead of "Samsung".
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150546613705&ssPageName=STRK:MEWNX:IT
http://cgi.ebay.co.uk/M9P-Battery-Charger-Samusng-Google-Nexus-S-/180611094933

shrivelfig said:
"WAY longer battery life"? Really really? I'm having some trouble believing this. The standard battery is 1500mAh. Are the extra batteries the same capacity? Because we are talking about something around 4-6% more power here.
This is either confirmation bias or blatant advertising.
Edit:
Fun fact: These two listings are from different sellers, but both write "Samusng" instead of "Samsung".
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150546613705&ssPageName=STRK:MEWNX:IT
http://cgi.ebay.co.uk/M9P-Battery-Charger-Samusng-Google-Nexus-S-/180611094933
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Obviously i'm not advertising, I am just posting my observations. My battery is lasting several hours longer than it did before under similar use. Right now I'm going on 6.5hrs of light use and I'm still at 81%. The OEM batteries I bought show the exact same part # as the one that came in the phone, but say 1440mah instead of 1500. I'm not observing any difference in how long they last compared to the original battery as today I am on the 1440 one.
I've been in the IT field for 18+ years. I know the difference between real results and 'confirmation bias'. These are real results I have experienced. You are more than welcome to share yours if you choose to spend $20 and duplicate what I did.

turbodroid said:
My battery is lasting several hours longer than it did before under similar use.
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I don't believe that unless your wonder-charger is literally cooking the batteries to death by some serious over-charging.
Right now I'm going on 6.5hrs of light use and I'm still at 81%. The OEM batteries I bought show the exact same part # as the one that came in the phone, but say 1440mah instead of 1500.
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So, the original battery to 1500mAh, charged to 96% in the phone would give ... 1440mAh. And range anxiety.
But the extra batteries, charged to 100% in the wonder-charger would give ... 1440mAh. And a peaceful feeling.
Yeah, I don't really see the "WAY longer battery life" here. If those 4-6% extra charge gives "several hours longer" then a full charge would be good for a couple of days of use anyway. And yet you were "spending half the day charging your battery". There's something odd about your story. The numbers don't really add up.
I've been in the IT field for 18+ years.
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I don't care if you're Isaac Newton. If you're starting to wave credentials and diplomas around, then this will be nothing more than a pissing contest. If that is what you want, then you win. Here, have an internet.
I know the difference between real results and 'confirmation bias'. These are real results I have experienced. You are more than welcome to share yours if you choose to spend $20 and duplicate what I did.
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No thanks. I have that exact same charger, and an extra original battery. If that charger actually makes that much of a difference, I don't want to cook my spare battery to death with it.
But feel free to back your claims by some real numbers taken from, you know, objective tests. One battery charged in the phone, the other in the wonder-charger. Then do the exact same thing (play music or whatever) until the batteries hit 15% remaining. Then post the elapsed times here.

Your condescending tone isn't worth my breath. My results are my results and I wished to share them with other people having battery issues and what I did to resolve them. I will continue 'cooking' my $10 batteries to a full charge and having a phone last several hours longer than it did before I started 'cooking'. You can do whatever with yours. Good luck to ya buddy.

turbodroid said:
Your condescending tone isn't worth my breath. My results are my results and I wished to share them with other people having battery issues and what I did to resolve them. I will continue 'cooking' my $10 batteries to a full charge and having a phone last several hours longer than it did before I started 'cooking'. You can do whatever with yours. Good luck to ya buddy.
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You know this isn't your blog or twitter feed to promote what you're doing.
Just like what you said, you're new to XDA so I wouldn't be too fond on trusting you either because you haven't been around too long.
I'll continue to stick to my battery. Grats on your long battery.

I go a full day with heavy use on my stock battery. Not sure what your problem is. Unless you can put up some real numbers though, this thread is not worth anyone's time.

After ordering both an OEM battery and the M9P charger I can confirm this.
I don't have screenshots yet, but The stock battery and the replacement OEM batteries I ordered. Function at around 4-6 hours more on the wall charger. With the stock charger charging my stock battery, I was seeing around 16-19hours with heavy use(phone and phone+bluetooth/text/web/youtube) with the M9P charger charging the battery, I have seen roughly a 4-6 hour improvement in battery life depending upon the usage change(i.e if i'm playing angry bird or NFS Shift along with other normal stuff)
I am, however, convinced the pulse charging vs. trickle charging done by the stock charger won't shorten the battery life. Plating will be come a real problem later on down the line, but with any smartphone, I don't expect to keep a battery longer than a year with my use before i either replace the phone or the battery.
If you guys want battery history shots, or whatever you might need to to help you get a better picture of what's going on, please let me know. I'd be happy to provide them.

Arasin said:
After ordering both an OEM battery and the M9P charger I can confirm this.
I don't have screenshots yet, but The stock battery and the replacement OEM batteries I ordered. Function at around 4-6 hours more on the wall charger. With the stock charger charging my stock battery, I was seeing around 16-19hours with heavy use(phone and phone+bluetooth/text/web/youtube) with the M9P charger charging the battery, I have seen roughly a 4-6 hour improvement in battery life depending upon the usage change(i.e if i'm playing angry bird or NFS Shift along with other normal stuff)
I am, however, convinced the pulse charging vs. trickle charging done by the stock charger won't shorten the battery life. Plating will be come a real problem later on down the line, but with any smartphone, I don't expect to keep a battery longer than a year with my use before i either replace the phone or the battery.
If you guys want battery history shots, or whatever you might need to to help you get a better picture of what's going on, please let me know. I'd be happy to provide them.
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Thanks for confirming my results. I was very displeased with the battery life of this phone, but since I went to the wall charger and just swapping batteries, I am getting a full 24hrs use and still have 10-20% left when I swap before work every morning. All in all a pretty cheap investment for the gains.
I am not seeing any noticeable difference between the 1440mah and 1500mah batteries either.

Just wanted to post my experience about battery life. It lasts almost two days (I switch off my phone for six hours every night). It wouldn't charge more than 95-96% every time. And it took really long time to charge too, with the oem charger. And then I tried my wife's Nokia charger, which is also 5V output but 1200mA instead of 700mA the oem is. And charged it turned on. And there it was! A bit less charging time, and for the first time it said 100% charged. That happened the last 6 charges with the Nokia charger. I hope I am not damaging the battery with what I'm doing. I can't say it lasts more than before. Nothing noticable. But at least it's fully charged and it doesn't take all day to charge.

i get 100% everytime when i unplug it will either drop to 97% or to 96% but will still last a whole day of use. i dont charge my battery unless it turns red with the X or till it shuts itself off.

[Q] Travel Battery Pack

I am on travel very often and my last experience with my Desire was that when working on the phone with no possibility of charging it, I was left with very little or non battery late afternoon. Any suggestion for a good Travel Battery Pack anyone? One extra charge will do. Thanks

Probably better off getting a spare battery, and charge it up, most easiest way i think instead of carrying aa batteries and charge cases, leads etc.
Just look on ebay and click cheapest first.
Sent from my LG-P990 using XDA App

Kickasskev said:
Probably better off getting a spare battery, and charge it up, most easiest way i think instead of carrying aa batteries and charge cases, leads etc.
Just look on ebay and click cheapest first.
Sent from my LG-P990 using XDA App
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Perhaps you are right. Thank you

you can get 3 spare batteries and a charger from ebay for about £10.50, Not sure whar that converts to.

stevvie said:
you can get 3 spare batteries and a charger from ebay for about £10.50, Not sure whar that converts to.
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Cheap lol but check the postage time if they are from CHINA
Good Luck
Got these Conversions for you for a rough guide
Sunday, May 1, 2011
11 British Pound = 15.91271 Swiss Franc
11 Swiss Franc (CHF) = 7.60398 British Pound (GBP)
Median price = 1.44461 / 1.44661 (bid/ask)
Minimum price = 1.44461 / 1.44661
Maximum price = 1.44461 / 1.44661
Hope this helps

i use solar charger it has built in 3000Ma battery you can also charge it from pc or adapter and ready to go with extra power. Have it from ebay for $29

Did anyone test any spare batteries from ebay? Thought of getting some, but not sure if it is worth it or not (the charge should at least be as high as the stock battery's) .

Got this few days ago from a china online retailer. Good construction and nice pocketable size. Slightly heavier than LG2X & about 20% thicker. Comes with 0.5A & 1A USB output.
So far, on 0.5A output, no in-charger lock ups yet - which I do get from some AC chargers.
Priced upwards of US$35. Google for "5000mah Power Bank".

will LG come out with an extended battery for the Optimus 2X ?

If they made 2 models. one like we have with a 1500 battery and one that is 1.2-1.4X thicker with lets say a 3000 battery I think almost everybody would choose the slightly thicker 3000 battery model.
These devices are small enough as it is, they should now stop trying to make them smaller as they are surely limited by the screen size, and make them last longer.
I had a Del Axim X50v a few years back that I brought an extended battery and battery cover for, this actually made the device feel better in the hand.

I think the future is not far... for batteries that are either running on gas or like these ones which can be fully charged in less than 3 min. http://green.autoblog.com/2011/03/23/new-battery-technology-electric-vehicles-recharge-minutes/

stevvie said:
you can get 3 spare batteries and a charger from ebay for about £10.50, Not sure whar that converts to.
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Well I order mine, but the version with 1 charger and 2 spare batteries (3 batteries is just plain greedy) We'll see how long they take to get here.

would like an option for dock/ battery charger and 2 batteries from ebay but combo NA last time i checked

Does anyone know of a portable battery pack that charges at over 500mah? all of the battery packs Ive seen are around 500mah and that doesn't seem to be enough to even charge the G2X coming from my old charger.

Spoo76 said:
Does anyone know of a portable battery pack that charges at over 500mah? all of the battery packs Ive seen are around 500mah and that doesn't seem to be enough to even charge the G2X coming from my old charger.
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I am using a 5000mah capacity battery pack. It has a USB port with 500mA output and another USB port with 1000mA output. See post no. 8 on this thread.
http://forum.xda-developers.com/showpost.php?p=13703777&postcount=8

How many times do you charge 0->100% ur lg using this powerbank ?
How long it takes? You use the 1A output ?

felixthecat said:
would like an option for dock/ battery charger and 2 batteries from ebay but combo NA last time i checked
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http://www.alibaba.com/product-gs/446992318/LG_P990_Optimus_2x_USB_Cradle.html
but you need to buy 50, and i have no idea how trustworthy is the seller.

tamere22 said:
How many times do you charge 0->100% ur lg using this powerbank ?
How long it takes? You use the 1A output ?
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Only tested twice from over 70% to full on 0.5A. Took longer than using AC adapter. Tried it once on 1A but got a bit hot quite quickly, so I switched over to 0.5A. Also, it takes a while to charge the pack itself from partial empty to full on 1A AC adapter - so I am guessing the 5000mah claim is reasonably accurate.

I bought this item from DealExtreme.
2200mAh Rechargeable Portable Emergency Power with Phone Adapters
SKU: 23734
It works fine, but the input broke after some uses and I had to fix it.

Energizer works best for me... as LG P990 wouldn't last a day with WiFi and 3G active... i have XP2000 and it works great!, the free tip for life is a welcome bonus... I'd post the link but since am a newbie, i cant.
please google Energizer Energi to go or energizer XP2000

Why do wall chargers take forever to charge battery?

Got it from eBay.
Charges faster in phone...while using!
If battery is around 40% it being be charged overnight.
Anyone else experience this?

could be the amp? maybe below 1 amp? Samsung charger has 2amps om it. check your charger and look for the amp. btw. the lower the amp the better for your battery..

Buy an OEM charger. The Samsung one is $50 from Samsung website but you can get the Asus charger from Google play store for $25. Both are two ampbi believe. Or you can get the 1a for $25 from samsung. Getting OEM directly from an OEM or authorized reseller or a storefront lime Google is key. Getting cheap chargers is gonna bite you in the ass one day or think about it like this. Why keep wasting time buying cheap chargers again and again when you can put up proper money and get quality in one go and have peace of mind for a few years. I even stopped buying chargers from amazon because they're just cheap knockoffs too. Phi hong makes good chargers and power supplies but they are harder to source. Phi hong came with my nexus one andy galaxy nexus OEM Home dock.
Anyways, aside from that part of the reason for slow charging is you probably have an unsafe charger that is not rated what it really is and is made of poor materials. Getting a quality 1a or higher, preferably 2a in this case and your gnote2 should charge @ 1.8a. In other words, you can charge from zero to full in ~2-2.5 hours. Or from partially full to 100% in less than 2 easily.
Sent from my GT-N7100

Unless I am mistaken, OP is referring to battery chargers, not usb chargers. That's how I charge mine, too. I have spare batteries, and they all get charged directly. When my battery is low, I just swap. I hate having my phone attached to a cord, even at night.
Yes, all the battery chargers I've had for every device (including this one) have been lower amp than the usb chargers supplied with the phone. It is especially slow for this huge battery for the Note 2. While it bothers me in concept, it's never actually been an issue for me, so I haven't done anything about it. I don't know if higher amp battery chargers are available, but I don't feel like spending extra money on one.
As far as battery health goes, charging at a lower amperage certainly isn't hurting the battery. If anything, it's actually better for it.

Yes...charging just the battery with wall charger.
@ 40% it will not be charged at 6am when I wake!!!
Are there better wall chargers?

Why do you hate having your phone attached to a Cord overnight. I heard that's fine and do it every night.!
dan_tm said:
Unless I am mistaken, OP is referring to battery chargers, not usb chargers. That's how I charge mine, too. I have spare batteries, and they all get charged directly. When my battery is low, I just swap. I hate having my phone attached to a cord, even at night.
Yes, all the battery chargers I've had for every device (including this one) have been lower amp than the usb chargers supplied with the phone. It is especially slow for this huge battery for the Note 2. While it bothers me in concept, it's never actually been an issue for me, so I haven't done anything about it. I don't know if higher amp battery chargers are available, but I don't feel like spending extra money on one.
As far as battery health goes, charging at a lower amperage certainly isn't hurting the battery. If anything, it's actually better for it.
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rockky said:
Why do you hate having your phone attached to a Cord overnight. I heard that's fine and do it every night.!
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Not for the phone, for me. It just bothers me having a wireless device locked to a wall. There's no reason for it. And I frequently get up in the night for various reasons (kids, work, insomnia, etc), and it bugs me unplugging in the middle of a charge cycle.
Incidentally, a non-removable battery was a deal breaker, and one of the reasons I didn't get a Nexus 4. I got used to never plugging in my last phone, and I don't want to go back. It was torture the first week or two with the N2 before my spare batteries arrived.

The charger should have its output printed on it, I've had a look at the pics on ebay and the first two I found that I could read were 500mA and 350mA, the original charger is 2A or 2000mA. Samsung make there own battery charger http://www.samsung.com/au/consumer/...es/EB-H1J9VNEGSTD?subsubtype=other-multimedia the output is 1.7A so much closer to the original usb charger.
I'd be worried about my back cover getting loose doing what you do. I had three batteries for my old phone, but I did not swap them on a daily basis, just when travelling or away from power for an extended time. I've ordered some wireless chargers so I can have one by my bed and another downstairs. I know they only output 500mA too, but for an overnight charge thats fine for me. I dont think there is any issue with interrupting the charge cycle, the two main enemies of lithium batteries are heat and being totally/almost discharged on a regular basis. Its best to keep them topped up.

scote said:
The charger should have its output printed on it, I've had a look at the pics on ebay and the first two I found that I could read were 500mA and 350mA, the original charger is 2A or 2000mA. Samsung make there own battery charger http://www.samsung.com/au/consumer/...es/EB-H1J9VNEGSTD?subsubtype=other-multimedia the output is 1.7A so much closer to the original usb charger.
I'd be worried about my back cover getting loose doing what you do. I had three batteries for my old phone, but I did not swap them on a daily basis, just when travelling or away from power for an extended time. I've ordered some wireless chargers so I can have one by my bed and another downstairs. I know they only output 500mA too, but for an overnight charge thats fine for me. I dont think there is any issue with interrupting the charge cycle, the two main enemies of lithium batteries are heat and being totally/almost discharged on a regular basis. Its best to keep them topped up.
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It looks like the OEM battery charger is available on ebay for around $15. That's good to know in case mine ever crap out on me. These cheapies that I get tend to.
As far as the back cover getting loose, after 3 months, it is a little bit looser than when it was new. 1.5 years with my G2x didn't loosen it at all, but the build quality on that thing was fantastic. I keep this in a case anyway, so it being a little looser goes unnoticed. If it gets bad, back cover replacements are cheap.

If one of the devs can make the kernel capable of fastcharge, it would not take but half the time to charge. Yank who is working with Faux on his kernel, helped make the kernel fast charge capable.
Sent from my SGH-T889 using xda app-developers app

UnixSlayer said:
If one of the devs can make the kernel capable of fastcharge, it would not take but half the time to charge. Yank who is working with Faux on his kernel, helped make the kernel fast charge capable.
Sent from my SGH-T889 using xda app-developers app
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But what is the point of having it charge fast, when all it is is going to drain faster?
I charge mine overnight with a charger rated at 750mah I believe and it last me a whole day. As oppose to using a 2.1 am charger I have, where the battery percentage would start dropping by the first hour.
Correct me if I am wrong here, but this is what I've notice with my last few phones.

The Perseus kernel with stweaks has the ability to change the charging parameters.
With it overclocked/undervolted I am getting better life than I did on stock.
Not for sure what you mean as it depleting the charge faster on a higher amperage charger. Kind of sounds like you may have had failing batteries, etc.

There seem to be a few misunderstandings here regarding batteries and chargers.
1) The charge rate, when the battery is in the phone, is controlled BY the phone. The charger itself just supplies regulated power to the phone. How much current is put into the battery at any given time is up to the phone, which is why kernels can do things like fast charge, it's controlled by the kernel. Now, the reason the battery charges faster when using the stock charger vs. something lower current or a computer is simple. The phone can detect what it's connected to within some limitations. It sounds like our phone can also sense the incoming voltage levels and back off if the supply becomes unstable.
2) Using the stock 2A charger is "harder" on the battery than a lower current charger. Not true, at least not within any margin of error you will be able to detect without specialized equipment. Lipo batteries are generally built to charge/discharge at 1C. C in this case stands for capacity. So our 3100mah batteries can charge at 3.1Amp and be within safety margin. So the 2Amp charger the phone comes with is perfectly fine for the battery. Without seeing a datasheet for the battery from Samsung, that's a good guess. And again, the phone controls the charge current based on a number of parameters. You could connect the phone to a 5V supply capable of 100Amp and it will still only use what it needs.
3) The percentage readout on the phone screen is a GUESS. Don't pay it too much attention. For this same reason, evaluating 3rd party batteries based on phone runtime etc is not useful. To validate the battery capacity with any accuracy requires a test setup discharging the battery through a known load and measuring how long it takes to get to a cutoff voltage. I've done some of these tests myself on stock and 3rd party batteries. In general, the OEM batteries are always at or above spec, the 3rd party battery manufacturers lie. Often by upward of 20%. Even the high $ batteries. Keep that in mind when shopping if you want extras or extended batteries.
4) Interrupting the charge cycle is bad. Nope. It's fine. On this same line of thought, full cycles ARE bad. Don't do it. Don't think too much about it either though. Just plug it in when convenient. Or set it on the wireless charger if you've installed one. Generally speaking, they actually don't like to be charged to 100% either. Keeping it at 20%-80% is actually best for the longevity of the battery cell itself. In practice, you will probably have a new phone before any of this is actually noticeable.
The OP sounds like they are talking about a stand-alone charger, where the battery is not in the phone. Those will vary wildly in quality and capability, particularly from ebay. They are probably cheap POS devices. Not that that's really a bad thing, just know about it. It's probably a very low charge rate device, perhaps even down to 100ma or so. That would take forever to charge our larger batteries. As for if there is a better one, probably. If Samsung makes one, it will probably charge faster than the phone with the provided charger plug as there would be no load from the phone using power. Of course, it will cost a lot more as well. Look for devices that at least claim they will charge at 2Amp or so. In practice, they will probably be a lot lower, but your chances are improved. Not many people will break out an ammeter and check, after all.

UnixSlayer said:
If one of the devs can make the kernel capable of fastcharge, it would not take but half the time to charge. Yank who is working with Faux on his kernel, helped make the kernel fast charge capable.
Sent from my SGH-T889 using xda app-developers app
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Perseus kernal has fast charging settings.

What ttabbal wrote is mostly correct. But the problem lies within some input voltage protection logic tied to the charger chip of the phone which is extremely (and too much so) sensitive.
rsalan said:
Perseus kernal has fast charging settings.
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Can people stop calling it fast-charge, it's an idiotic term which technically means nothing. While most kernels have some sort of charging speed configuration options, they're all useless in regard to this problem as the current in the end is decided by a different logic. You'll have to disable unstable power detection and that's the only way to make it work and fix the problem, unless you go hunting down high quality cables and chargers.
Personally I also encountered the problem as my stock S3 charger, as many others here have reported, has deteriorated and it would only charge at an effective 300mA. I disabled unstable power detection and now it charges at the full given current limits, without any issues.

rockky said:
Got it from eBay.
Charges faster in phone...while using!
If battery is around 40% it being be charged overnight.
Anyone else experience this?
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You have to make sure it's "2a" charger capacity. It happened to me once. Go to monoprice.com and search for a universal 2a charger... pretty cheap

External Battery Pack

For those that want to be sure they can make long trips without running down their battery, try this battery pack. Packs with only about 10% of this capacity sell at this price. 30000mah for less than $25. Notice that that is 30000 and not just 3000.
I won't guarantee their stated capacity, but I'm still trying to run down the one I got last week. Once I succeed in getting it discharged to the point where the internal N7 battery takes over, I'll post the result.

It's from China, I doubt very much that the actual rating is even close to the 30000mAh stated.
Also I see from the label that they say 5v input and 5v out?? it's not possible to fully charge a 5v battery with a 5v charger, the input voltage needs to be higher.
Looking at the sellers negative/neutral feedback most of the complaints seem to be about cheap and shoddy items which doesn't bode well for what you'd get.

Troute said:
It's from China, I doubt very much that the actual rating is even close to the 30000mAh stated.
Also I see from the label that they say 5v input and 5v out?? it's not possible to fully charge a 5v battery with a 5v charger, the input voltage needs to be higher.
Looking at the sellers negative/neutral feedback most of the complaints seem to be about cheap and shoddy items which doesn't bode well for what you'd get.
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Ipads are made in China. So what? 5v in and out is done all the time via internal switching PS. If you buy one and test it, then your opinion of "shoddy items" might count. As it is, I am testing it and so far the results are quite impressive.

To give you some real world data to work with, I have a 10,000mAh battery pack which will charge the N7 from about 30% to full twice with a bit left over, it's an Anker Astro 3 and quite big which it needs to be to pack in 10 Amps. Once you've had a chance to test yours maybe you can post the results here.

Troute said:
To give you some real world data to work with, I have a 10,000mAh battery pack which will charge the N7 from about 30% to full twice with a bit left over, it's an Anker Astro 3 and quite big which it needs to be to pack in 10 Amps. Once you've had a chance to test yours maybe you can post the results here.
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That sounds about right for a 10A pack. I'm still testing mine but I only use it when I'm out. So far, active reading time only amounts to about 4 hours. The tablet has been on for several days but most of the time in sleep mode. So far the battery pack still only has the first of the four LEDs blinking. I'll be using it for several hours today and I'll see what that shows.
As I said, I use it primarily for reading when I'm out but during that time wifi, MagicJack and Groov IP are all running and I do some browsing.
edit: Update. So far the N7 has been on for about a week with about 16hrs of actual use. The battery pack LEDs indicate it still has half charge. I'm quite happy with it.

Hi,that seems to be a cool pack,any new feedback?