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I am attempting to build a small 4xAA USB charger to use while on long flights so that I can watch movies. I notice that the wall charger is rated 5v 1000ma. I wonder if anyone has any clue what the Kaiser draws at full processor load. I can make a 4x AA charger with a 1000ma capacity, but if i could get away with something like a Minty Charger(2xAA, maybe like 500ma), I would, as the plans are there, and it would save me 15 bucks for a switching voltage regulator.
Has anyone done any work to this effect, and would they mind sharing their measurements?
Thank you in advance,
Ben
use batterystatus and check consumption when watching a movie or something
I will certainly check that, thanks!
Also does anyone know whether the kaiser has and odd charging tendedcies?
My plan basically calls for 4 aa batts wired in series to provide 6v, into a 5v switching voltage regulator, and out to USB. Will this be something that will work, or are there any odd little caveats i need to worry about?
Ben
The USB spec calls for a max of 500mA at 5V. Since the Kaiser can charge off of USB, then that should work.
I have a back ground in basic electronics, and building something like this would be right up my ally. But when I can find just what you want at a price like this>>
http://www.thepocketsolution.com/PSI-42555.html
I can't see any reason to bother building my own. I use this vary one, for just the same reasons you want one. And it works great.
GWelker62 said:
I have a back ground in basic electronics, and building something like this would be right up my ally. But when I can find just what you want at a price like this>>
http://www.thepocketsolution.com/PSI-42555.html
I can't see any reason to bother building my own. I use this vary one, for just the same reasons you want one. And it works great.
Click to expand...
Click to collapse
Wow! I suppose I should have done a little more research first That charger costs the same as a decent switching voltage regulator.
Does that thing look like it's easy to open up? I may wish to modify it slightly so that I can charge other USB devices off it. I also probably want to repackage it into something fun.
Thanks for letting me know about this charger... You have saved me a lot of soldering
Ben
edit:
http://www.thepocketsolution.com/PSI-36223.html
I'm scratching my head re this one. The tilt and the kaiser are, with very few exceptions the same phone. I would imagine that the battery chargers here are the same too, though this one is a couple bucks cheaper. The AAA model is only 10 bucks... I imagine that all these things are is a voltage regulator and an LED... if i am gonna rip one apart anyways, is there any reason i couldnt get the AAA model, tear it up, jack 4 AA batteries to it, and get all the benefits of the 15 dollar model, for 10? Im not really penny pinching, though if i decide to repackage the whole deal anyways, might as well save the 5 bucks and buy a USB jack
ben
with the cost of geting the parts, you can buy one for about USD 10.
kms
You might want to check that giving the phone 5 volts will actually put it into charge mode. I believe the mot razar won't charge off the USB unless it first communicates with the computer. Don't know though, I only borrowed the phone for a week when traveling for work.
As for power consumption, I took a 10 hour trip yesterday. Bought a USB car charger and used the data cable that came with the phone. I plugged it in and it went into charge mode. Running tomtom and such didn't charge the battery to any meaningful extent while it was plugged in. Fortunately, it didn't drain the battery either.
Maybe the phone knows the diff between USB and an OEM charger, and draws power accordingly (500mA for usb, 1 amp for OEM charger).
Edit: the car usb thing I picked up is rated for 5v +-.5 volt and 1 amp output (says the sticker anyway). Does the job I was hoping for and was cheap (6 bucks at fry's).
Nice!
I think im gonna order 2 of the battery chargers linked above. one i will keep stock (i leave for spain in a few weeks and need one to work)
the other i will rip apart and see if i can do something fun and exiting with it. I think i have an empty altoids box around somewhere.... the one i used to hide smokes from the parents in when I was a kid....
I like breaking stuff!
Ben
Note that the Tytn II's charge circuitry may require more than 500 mA if the battery is sufficiently discharged. In such conditions, a 500 mA charging current won't actually charge the battery. A 1000 mA charging circuit should be sufficient, as that matches the device's rating as specified in the manual.
Be real careful..
Be careful taking any home built electronics on a plane in these days since 9/11.
A girl in USA got done for having a battery and LED on her t-shirt in an airport and wasnt even flying...
id be amazed if you were allowed to take a home-built circuit onto a plane, esp. in the USA
just saying
g
pontifex33 said:
edit:
http://www.thepocketsolution.com/PSI-36223.html
I'm scratching my head re this one. The tilt and the kaiser are, with very few exceptions the same phone. I would imagine that the battery chargers here are the same too, though this one is a couple bucks cheaper. The AAA model is only 10 bucks... I imagine that all these things are is a voltage regulator and an LED... if i am gonna rip one apart anyways, is there any reason i couldnt get the AAA model, tear it up, jack 4 AA batteries to it, and get all the benefits of the 15 dollar model, for 10? Im not really penny pinching, though if i decide to repackage the whole deal anyways, might as well save the 5 bucks and buy a USB jack
ben
Click to expand...
Click to collapse
I can't see any difference in these two. I've had this one for over a year and half. I used on the 8125, the 8525, and now the Tilt.
As far as a AAA ver a AA, since the voltage is the same between the two, then it is only a question of mAh capacity.
I have one thing to say if your coming into America with some home made electronics your going to be thrown in Jail ...
ripnetuk said:
Be careful taking any home built electronics on a plane in these days since 9/11.
A girl in USA got done for having a battery and LED on her t-shirt in an airport and wasnt even flying...
id be amazed if you were allowed to take a home-built circuit onto a plane, esp. in the USA
just saying
g
Click to expand...
Click to collapse
I've actually taken a suitcase full of half built circuit boards and electrical components as carry on (half finished school project). They didn't even raise an eyebrow. As long as it isn't connected to something that looks like a bomb, I don't think they care.
thanks, i surmised that based on some other devices i have. I'm not too concerned as the battery will never (hopefully) get critically low. I'd like to jsut keep the thing running for ~9 hours while running either GPS or a movie... I hate plane rides, and i need something to do to entertain myself. I'll see what the charger mentioned above can put out. I just ordered two, and we'll see what it looks like... I'll write a review when i have had time to play with it a bit.
I've had Archos portables for years and it also has a 5V input. A simple 4 cell pack using 2300-2900 NiHi AA batteries in series will easily power these devices for over 10 hours straight. What's nice is that you don't need any regulator at all, just don't use alkaline batteries in it as you'll be at 6V. I carry a very small 4-cell charger to charge the cells. Works great for long travel. I took an iPod version with battery fuel gague, stripped out their power supply and just kept the power switch and fuel gague circuit. This costs more but works really well and looks good too.
So this thread is of some use to others: here are some data that i collected regarding current draw:
Locked with the screen off, no apps running: 1-4ma
TCMP playing a movie fullscreen: never more than 350ma
TCMP Playing in background with tomtom navigator 6 running: 416ma
all done in flight mode with the backlight set to the middle.
Can you you do a worst case test for current draw?
Turn on GPS, bluetooth, Wifi, backlight max and not flight mode.
I've had the Droid 3 for about 10 days now, and I've been encountering an intermittent problem with charging the phone.
Last night, I plugged in my phone so that it would charge overnight. I made sure that the connections to both the phone and the outlet were firm, and upon plugging it in, my phone's battery icon and lock screen both indicated that it was charging. However, when I woke up this morning, I discovered that the battery had actually continued to discharge overnight. Despite this, the battery icon and lock screen both continued to say that the battery was charging.
I've run into this problem three times this past week. It's entirely possible that I just have a defective device, but I wanted to check and make sure that nobody else was experiencing this issue before taking it back to Verizon.
Check the task manager for programs using lots of cpu. I've found that using google maps nav in the car dock while charging still in fact uses more power than it could charge. Your issue is with the screen off though so check for background apps.
Sent from my DROID3 using XDA App
I have had this problem 2 times and I have had the phone for about the same time. I plugged it in at like 40% watched a movie screen never came on till the movie was over I looked at my screen and the battery was at 11%. I was thinking maybe just a bad connection untill I looked at the notification bar and it said it was charging!
I just got my Droid 3 yesterday and last night, the first night of use, it did the same thing. Even if I go into battery usage and look at the graph it'll say charging but the power level will be going down. Very frustrating.
A Verizon rep I spoke with recommended trying a different charger. Sounds reasonable enough, so I'll give that a shot and post back after a few nights of use.
What is the current rating of the chargers you guys are using? (i.e. 850 mA, 1 A, etc). A good rule of thumb is not use anything less than 1 A (1000 mA).
The Motorola-supplied charger is 850mA.
RandomEncounter said:
A Verizon rep I spoke with recommended trying a different charger. Sounds reasonable enough, so I'll give that a shot and post back after a few nights of use.
Click to expand...
Click to collapse
This sounds logical. I had this same problem two phones that happened to have a slide-out keyboard (Shift, G2) and the problem vanished when I used a different charger. I just read today that 100s of people were having this problem today in a news feed.
I was having the issue too, so I used a 2A charger that came with my Huawei tablet...no more issues! (Charge time is about 1.5 hours too!)
pplude said:
I was having the issue too, so I used a 2A charger that came with my Huawei tablet...no more issues! (Charge time is about 1.5 hours too!)
Click to expand...
Click to collapse
I'd be careful about using higher amperage chargers. Don't want to be burning out the charging circuitry. Not saying you will.. just be careful using a charger not designed specifically for the device.
Apparently the new Moto LiPo batteries have another level of overcharge protection. To be safe, I'm going to use an ohm-meter about once a week or so to check the internal contacts (a higher ohm rating would suggest damage).
pplude said:
Apparently the new Moto LiPo batteries have another level of overcharge protection. To be safe, I'm going to use an ohm-meter about once a week or so to check the internal contacts (a higher ohm rating would suggest damage).
Click to expand...
Click to collapse
Good to know. I found one of those chargers for $6, I'm considering getting one now.
http://www.bargaincell.com/huaweiid...e-p-509461.html?cPath=58893_59091_59092_59093
elkay said:
Good to know. I found one of those chargers for $6, I'm considering getting one now.
http://www.bargaincell.com/huaweiid...e-p-509461.html?cPath=58893_59091_59092_59093
Click to expand...
Click to collapse
That's not the one I have, I'm using the USB-output charger from the S7 SLIM, then the Moto supplied USB cable.
Well, it's been a few days, and I haven't experienced the problem since switching to a different charger. Granted, the problem was intermittent, so it's difficult to know for certain if the charger was in fact the issue, but I'm content with this solution.
I've been using my iPad's 5.1V 2.1A charger without issues for a few days. It charges the extended battery from 10% to full in a little over an hour.
That's the dual-core proc for ya. Wonder why the Xoom uses a proprietary charger? dual-core devices nom battery.
Jewremy said:
That's the dual-core proc for ya. Wonder why the Xoom uses a proprietary charger? dual-core devices nom battery.
Click to expand...
Click to collapse
No? Dual core is more efficient, it shuts down one of the processors when it's not in use. Dual core means nothing about power efficiency. As a matter of fact, it can have an advantage. Each core uses less power, and combined, they can use less power than a similarly powerful chipset.
I've also run into some issues on my 5 day old Droid 3. It seems to be when disconnected from the charger. I have two regular Moto chargers for this, and tried a 1A HTC charger, which this thing will not charge from.
I tried using different micro USB cables, which didn't help, either. I was trying to move the phone around while charging, and seemed to encounter the issue. Either it's a connector issue for the mUSB, or the (especially short and stiff) charging cables have broken conductors inside, and we're getting a bad batch of cords.
Possibly the D3 has its own issue with charging, but I didn't have a problem until this morning. regular mUSB cords won't work for me at all, as I've tried all I have.
Given this issue, I'm wondering how widespread this is, and if it's something to take the phone back for. I took me a few hours (over 3) of waiting and fiddling with it, but it's at least charging now.
I had this issue to. I used a different charger and cord to charge my phone at night woke up the next day no charge. I went to work pluged in to my wall charger and still no charge. I did a factory reset thinking that might work but it did not. I was going to take it to a verizon store after work so on the way there I pluged in to my car charger an it started to charge so I skipped the store. When I got home I used a different cord and wall charger and it also worked. I did notice that when I plugged in the night before that a small little white light was lit up for a second in between the charging port and hdmi. I know there is a light there but never seen it light up before. So maybe that was behind all of this. Not had a problem sense.
Sent from my DROID3 using XDA App
The amperage you see stated PS units has no effect on your phone. That's not how many amps leaves the unit to charge your battery. That's how much the PS unit can handle as a draw. In reality the reason the stock ones are only 850 only means that the manufacture used spec parts for the PS unit. i would think that Motorola's minimum spec was 850 and so that's what the PS units manufacture used.
The higher the number means nothing other than you can bet the 1AMP one is going to out last the 850.
Of course the last statement is highly speculative because i have no idea what the amp rating for the phone is. But what i do know is that all the parts are made in china and you can bet they are not going to overbuild anything.
If the amp range is 675-832, which is the number I would expect then if the phone draws more than 850 for an extended period of time the units internal fuse could blow. Unless of course you purchased a third party unit that has an external fuse. Then you can jsut replace the fuse and not have to worry about going out to buy Chinese garbage. lolz
but then again i bet this Droid 3 is made in china, oh well. I like it anyway
If you're impatient like me, here's a DIY $13 mod I did to make the extended battery wireless charging enabled. Presumably works on all charging mats as the whole idea behind Qi is a universal standard.
http://uselesspuzzles.blogspot.com/2011/09/droid-bionic-optimizations-extended-bat.html
Photos and videos at the bottom of the post.
Here's the main video:
http://www.youtube.com/watch?v=nR7egtQl-Zg
I moved the coil a little bit so the connection was more secure after the video. Works without issue.
I bought like 5 touchstones so I can have one in my home office, office office, bedroom, living room, etc.
Do you know if the touchstone works with the VZW inductive charging back for the standard battery?
slvrdrgn123 said:
Do you know if the touchstone works with the VZW inductive charging back for the standard battery?
Click to expand...
Click to collapse
honestly i havent really read into the different technologies used... so no idea
my guess is if it did work it would probably not be as good an experience as the magnets are probably not placed in the same alignment (so the phone won't know exactly where to attach giving a sub-optimal placement)
Wow
Looks pretty nice, I happened to have the soldering supplies and wire might do this myself. How is the charging time as I can't find the output for the touchstones anywhere. Would you still recommend it after having it for a while now?
nah don't do it
it has to be perfectly aligned to charge properly- from what i've read the real bionic backplate works even through cases-
i'd say wait for a better version that is less finicky
or make one with the bionic reg. battery wireless charging door like i plan to
Triskite said:
it has to be perfectly aligned to charge properly- from what i've read the real bionic backplate works even through cases-
i'd say wait for a better version that is less finicky
or make one with the bionic reg. battery wireless charging door like i plan to
Click to expand...
Click to collapse
I'd like that. I tried my bionic with the inductive charging door on the touchstone, and I couldn't get it to work, so this mod would be great. I hate the LG charging mat for the bionic
Do you know if this was a tight squeeze in the extended battery door? Also, does this mean you cannot take the door off anymore?
Hey guys, i know older post...has anyone done this with the reg battery?
If so, what kind of chargign times are u getting? ALso, are u usign the Palm mat or some other mat.
My intention is to use this with teh standard battery, and battery cover, so i can still use gel case
i'm still waiting for the long promised true wireless charging where the same towers that supply us our signal also charge our phones.
it's barbaric that we're still having to plug in somewhere to charge. what century is this anyway !!?!?
voxigenboy said:
i'm still waiting for the long promised true wireless charging where the same towers that supply us our signal also charge our phones.
it's barbaric that we're still having to plug in somewhere to charge. what century is this anyway !!?!?
Click to expand...
Click to collapse
Specially since Tesla had this idea a longgggg time ago. Sure would be nice...
Very nice
Sent from my DROID BIONIC using XDA App
I did this using the stock charging cover for the bionic.
It works perfect but you need a Qi compatible pad. After searching I found one on ebay for 35 bucks. The only problem is it makes removing the battery difficult. My next project is to see if I can make the mod so it works just like the production cover.
this has been real hell finding information about whether this http://www.ebay.com/itm/Powerocks-p...y_Chargers&hash=item3cc55ca8b0#ht_4645wt_1163 is compatible with my Motorola defy+ (note custom roms, Switching from time to time, Currently on WIUI ICS) and other information such as how long does it last and etc.
has anybody used this?
is it worth the money and how does it translate to battery % on my defy+.
any other feedback?
and maybe other recommendations (with that price region)
and is there a thing like this that uses AA batteries, if so, how many will it take to charge my Defy+
thanks ahead
EDIT:
what's the proper name for that thingy? because this thing has wayyyy too many names,
power bank, external battery, portable charger, portable battery, extra battery. and many many many more!!! this is why it's complete hell finding information.
what's the real and most proper name for it?
Just a single word 'AVOID'
i don't usually like to be disrespectful, but.
you sir, have convinced me with your long list of arguments and good points of reason to support your advice.
could you please explain, why?
Ok. Here it goes.
I have used these chargers long back, I think around a year back. It barely charges 15% of your mobile battery (I was using a Samsung Galaxy Apollo at that time which had a 1500mah battery) with a single AA cell which I think is totally not worth.
I hope this is enough for you to get a fair idea
so, you're saying that the Portable chargers that use AA batteries are bad, or are you saying all these portable chargers are bad and charge too little?
if you're saying that all the portable chargers are bad and charge too little, then i would have to say that it depends on how much mAh the charger can hold.
say i get the 2600 mAh charger to charge my Defy+ (think around 1700 mAh) when it's completely out, i think that i will charge fully at least once (say around 1000 mAh at MOST! is lost because of the charging procedure)
i'm only talking about the AA battery based chargers. I don't have any idea about other powerpacks as I've never used it.
1 AA battery for 225 mAh!?!?!?!? that's awesome!!! would be great for camping trips, you get like 12 AA batteries (or more, depends on how long you plan to be away from charging your phone normally) and you can even play in the evening or even watch porn if you got Data signal!
i'm still probably going for the normal one, and maybe i'll get an extra charger that uses AA batteries in-case i go camping somewhere.
can people please give feedback on whether it's good enough? why are there only 2 posters?
I think that it works just seen a duracell one in a store near me wich holds 4 AA batts, i think on buying it and fillit with some 4 NiMh AA acumulators rated at 2700 mAh each, just think about it thats 10800 mAh in a portable charge, that will charge my Defy battery at least 5 times even with an extra burning that the charge does.
Sent from DefyX RED.
kHron0S said:
I think that it works just seen a duracell one in a store near me wich holds 4 AA batts, i think on buying it and fillit with some 4 NiMh AA acumulators rated at 2700 mAh each, just think about it thats 10800 mAh in a portable charge, that will charge my Defy battery at least 5 times even with an extra burning that the charge does.
Sent from DefyX RED.
Click to expand...
Click to collapse
isn't there a case of voltage involved? (idk, i'm a complete noob in this)
and i need something smaller, something as small as the charger i posted.
i'm just curios to know if it works or not and any other feedback about it.
Bump
bump
Confidential said:
bump
Click to expand...
Click to collapse
lol
NiMHs are 1,2V which means, 2700mAh hold 2700mAh * 1,2V= 3,24 Wh which is the same as 11,664 kJ
The Defy battery holds 1500mah at 3,7V --> 5,5 Wh = 19,98 kJ
Taking efficiency in count you might be able to load your Defy with two fully charged NiMHs once, but i`d rather expect that two are not enough.
As for the that eBay-offer: The voltage is given as 5,1V. With 2600mAh that would mean 13,2 Wh. But i rather believe they are stating the capacity at 3,7V for marketing reasons. That would mean 9,62 Wh. That would allow you to recharge about one and a half time.
bump?
So someones after advice on portable power when away from the mains?
Ive been using a New trent imp1000 to keep things going, its a li-ion rechargable powerpack with a capacity of 11000mah and it keeps my Defy going for 4 days.
I also have a total of three batterys for my defy, and a universal li-ion external charger, called a cam caddy, although its designed to charge camera batterys from a 5 volt supply it also quite happily charges up the battery for my defy as well.
So for extreme use i can have a battery in use in my phon, plus a spare with me, and back at base ( or just overnight) a battery on charge in the cam caddy.
If im in an area with access to mains i will take the imp1000 and its charger to top up where and when i can.
I also have a universal USB charger with swapable plugs that fit all major power outlets worldwide.
And to top it all off a USB AA battery charger that will ( slowly) charge up 4 AA batterys form a solar panel, or from a USB input ( faster) , or output 5V through the USB out put port.
This little set up has kept me going for 14 days with no access to mains power ( except for a few bits here and there - 20 minutes at a bus station/railway station and so on) , keeping my phone going (defy) a high powered AA cree LED torch, a camera ( via spare battery+cam caaddy) and an mp3 player. the trick is careful battery management - on the defy turn off everything when not in use, except the ability to receive calls and number your batterys for ID, and the same for cameras etc etc.
2Pints said:
bump?
So someones after advice on portable power when away from the mains?
Ive been using a New trent imp1000 to keep things going, its a li-ion rechargable powerpack with a capacity of 11000mah and it keeps my Defy going for 4 days.
I also have a total of three batterys for my defy, and a universal li-ion external charger, called a cam caddy, although its designed to charge camera batterys from a 5 volt supply it also quite happily charges up the battery for my defy as well.
So for extreme use i can have a battery in use in my phon, plus a spare with me, and back at base ( or just overnight) a battery on charge in the cam caddy.
If im in an area with access to mains i will take the imp1000 and its charger to top up where and when i can.
I also have a universal USB charger with swapable plugs that fit all major power outlets worldwide.
And to top it all off a USB AA battery charger that will ( slowly) charge up 4 AA batterys form a solar panel, or from a USB input ( faster) , or output 5V through the USB out put port.
This little set up has kept me going for 14 days with no access to mains power ( except for a few bits here and there - 20 minutes at a bus station/railway station and so on) , keeping my phone going (defy) a high powered AA cree LED torch, a camera ( via spare battery+cam caaddy) and an mp3 player. the trick is careful battery management - on the defy turn off everything when not in use, except the ability to receive calls and number your batterys for ID, and the same for cameras etc etc.
Click to expand...
Click to collapse
i think 11000 mAh is a little too much for me, it may be good for camping trips and etc, but i don't think i'm gonna buy something that (probably) big and (probably) expensive. most of the use of the external charger will be when i'm out with friends for a long time, or say after school i spontaneously decide to go out with friends before getting home (unfortunately a 1 hour drive from friends city to mine) so i need an a portable charger so i won't get bored on the way back, my battery lasts a school day, if i go somewhere that is not home after school, it won't last.
about the extra batteries, are those original from motorola? if not, are they as good as the original? are they worth getting?
The batterys are official motorla ones, as i b ought a cheap un official one and that had issues ( wouldnt show the charge level on the defy )
The battery pack is a "new trent imp1000" which costs £30 from amazon.
I also have a dock for the defy in which my phone usualy sits, at the back of this dock is a slot for an extra battery, left overnight this will charge both my Defy ( with battery inside) and the extra battery in the slot, this is plugged into a dektop pc where some of the USB sockets are still powered up ( giving out 5v) even when the desktpop p.c is off
supdealer offers nice portable power bank
as portable external battery/power bank/portable charger, An ebay seller called supdealer sells a nice one. You can have a look.
It may help you. :laugh:
I have that new Trent battery, its perfect almost same size as defy.
Sent from my GT-P3113 using Tapatalk
Guys,
If you really want true power on the go, buy a YOOBAO power pack, the 11200 mAh one.
It is really a beast and is really charging a defy several times before going empty.
http://www.ebay.com/itm/New-Yoobao-...?pt=US_Tablet_Accessories&hash=item3377c5ccd4
One thing to the initial question...
Confidential said:
this has been real hell finding information about whether this http://www.ebay.com/itm/Powerocks-p...y_Chargers&hash=item3cc55ca8b0#ht_4645wt_1163 is compatible with my Motorola defy+
Click to expand...
Click to collapse
Yes, all iPhone compatible USB-Chargers are compatible to our Defy and other new mobiles.
Why? EN_62684: Common External Power Supply (EPS)
Why would I use Li-ion instead of AA Cells (NiCd,NiMH or NiZn)?
Higher Energy Density!
Another benefit of Li-ion is the discharging charakteristika (sorry for german captions).
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