Database Develop

[Q] Battery cycle charging

When I first got my Captivate, the battery life was pretty good. I was able to get about 13 hours while only draining 10% of the battery in standby mode. However, I recently had the battery drain completely until the phone turned off by itself, and I recharged it to full while having the phone turned off.
I thought that would improve the battery life based on what I've read, but it hasn't. The battery life has gotten worse! Now, I only get a little more than 5.5 hours for 10% battery life in standby mode.
What should I do to get the battery performance back to where it was originally? Should I do another full cycle charge with the battery depleted and charging it while the phone is off? Or should I let the battery get close to depleted and charge it to full while leaving the phone on? What's the correct process for cycle charging?

BTW, I'm not rooted, and everything is stock with the exception of LauncherPro. But I was already using LauncherPro when the battery life was good.

Consistently Incorrect Battery Percentage

Hey all,
I have had terrible misfortune in the realm of battery stats. Ever since CM7 (and maybe even before) my phone is unable to figure out how much battery is left. Here is a common scenario:
Charge phone overnight, use phone throughout day, battery dies after 6-7 hours of moderate-heavy usage. I plug it in, reboot, and then it reports ~60% battery left.
Another common scenario is that it will dwindle around 5% battery or less and go up and down until it finally dies.
I know that this is a misreading of the battery and not battery drain or a rogue app because when I flash a new ROM the battery life is amazing for 1 day. The day after I flashed Team Hacksung's ICS rom, I got almost 17 hours of battery life with 2.75 hours of the display being on and 30 minutes of Google Music. I was blown away! But even then it was dwindling around 5% not knowing when it would actually run out. The day after, it was back to its old tricks of misreporting the battery percentage.
Today I charged it to 100%, unplugged it, and shut it off. Then I plugged it in while it was off and let it charge to 100% again and wiped battery stats in Clockwork mod. I'm getting ok-ish battery with that, but it's not even close to how good it was when I first flashed ICS.
Anyone have any ideas what I could try?
Thanks!

When you wiped the battery stats did you let the battery fully discharge and shut off before charging again?
After wiping battery stats it is recommended to let the phone fully discharge to the point where it will automatically shut off.

Keep in mind with the age of our phones, it could just mean your battery is dying. Try the above method, but in my experience uncalibrated battery only last a few days. The phone will "fix" it by itself the longer you use it.

j.curtis.369 said:
When you wiped the battery stats did you let the battery fully discharge and shut off before charging again?
After wiping battery stats it is recommended to let the phone fully discharge to the point where it will automatically shut off.
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Click to collapse
That's what I'm doing currently. Battery life seems improved, but we'll see what happens. It's nearing death now, ~6%. At this point it will probably misreport it for a few hours until it finally dies. I left it unplugged overnight, so now it's at 19.5 hours uptime with 1.75 hours display time.
Definitely improving! I hope that it successfully recalibrates.

Battery stats have nothing to do with how the os calculates remaining battery...they are what is displayed in settings>about phone> battery use and are reset each time you charge to full.
You're just giving it a good bump charge...wiping the stats is just a placebo effect.

studacris said:
Battery stats have nothing to do with how the os calculates remaining battery...they are what is displayed in settings>about phone> battery use and are reset each time you charge to full.
You're just giving it a good bump charge...wiping the stats is just a placebo effect.
Click to expand...
Click to collapse
Seriously? Wow I didn't know that. Is there a way to actually reset how the OS calculates the battery?
Does this app do anything?
https://market.android.com/details?...xLDEsImNvbS5uZW1hLmJhdHRlcnljYWxpYnJhdGlvbiJd

Nope...that app is just perpetuating the myth of what the batterystats.bin file does.

Don't hate me for this but, Then how come Roms usually give me better battery life after a full cycle? not bump charging or deleting battery.bin just running it?

Because the system for tracking the remaining power is getting to know your battery. once it gets a feel for it, it's more accurate. In theory anyway

So the "give it a day" is still true, at least in theory?

Sure
10 char

battery gauge temporarily fixed by removal and replacement of battery
Ever since I rooted my phone, I've noticed that the battery gauge/meter is way off. I keep an eye on the charging voltage and try to pull the plug around 3.92 volts. Problem is, the gauge is always reading low until I pull the battery, wait a few minutes, and then reinsert and boot up. Then it's fine for a while, but I notice it creeping down even though I keep topping it off with a charge to keep it around 3.92 volts.
What's going on? Do I have to fully deplete the battery and charge to full to have an accurate (or somewhat accurate) battery gauge? Do I have a bad battery (this battery has been used only a couple months)? Is something else going on here? Recommendations, studacris? Doesn't the os use battery voltage to calculate state of charge (%)?

New battery life

Hi!
I changed my Xperia T battery 2 days ago because my old battery lasted about 12h with 3-4h screen on time (sms, snapchat, facebook, and around 30mn per day of game) = 10%/hour . But after replacing battery, the battery life is the same...
Then, I charged it at 100% to get discharging at 10% and repeat the operation for calabrating the battery by itself.
Now, when I'm at 10%, Battery Calibration indicate me 3700mV but the Xperia T battery is "dead" at 3200mV and full at 4200mV, so when I'm at 10% I have to be at 50%.
Should I calibrate my new battery using Battery Calibration app or not ?
Thanks, and sorry if you are not able to understand what I say, I'm french

I think its a solid battery life of 1850mah battery on a 4.55inch screen. I usually get about 3 or 4 hours of screen time too, but it lasts about a day and few hours more. I think it depends how much you use your phone. And battery needs time to settle, so see how it will work after about 10 charging cycles.

Ckovvi said:
I think its a solid battery life of 1850mah battery on a 4.55inch screen. I usually get about 3 or 4 hours of screen time too, but it lasts about a day and few hours more. I think it depends how much you use your phone. And battery needs time to settle, so see how it will work after about 10 charging cycles.
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Ok, thanks :good:

Battery life

Hello guys i have bought a note 8 from 7 days and i have Seen that battery percentual decrease quickly. In the morning after some minutes with only display unlock i loose 5%.
Is this normal?
Thank you

Dude dont charge your phone to 100% over and over all the night. You cant remplace easily the battery. Dont worry about your battery drain, I thinks is ok. Normally we got 6-7 hours of screen on time, so if you only lose 5% in 30 min... it mean you can get around 10 hours!

anon_durden said:
Dude dont charge your phone to 100% over and over all the night. You cant remplace easily the battery. Dont worry about your battery drain, I thinks is ok. Normally we got 6-7 hours of screen on time, so if you only lose 5% in 30 min... it mean you can get around 10 hours!
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I charge my phone on a wireless charger base overnight and it stops charging when at 100% and no problems! Anyway, if you read the latest thoughts on charging, keeping the battery over 60% is best and no damage will be done by over night charging!
Sent from my SM-N9500 using Tapatalk

robmeik said:
I charge my phone on a wireless charger base overnight and it stops charging when at 100% and no problems! Anyway, if you read the latest thoughts on charging, keeping the battery over 60% is best and no damage will be done by over night charging!
Sent from my SM-N9500 using Tapatalk
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Click to collapse
The best for a litium battery is stay in 40-60 percent. Charging more than 80% will also damage your battery life (but sooo much less than let it drain to 0%). Charging over night isnt good for a battery (at least I think it). Check AccuBattery, is a very nice app to battery management. And when you hit the 100% it stops, but will run again because you wont get a 99% while the phone are in the pad. Hope I help you ^^

Do you monitor your data? You could have some apps working in the background and using both your data and battery. Install a data monitor app to check which apps use your data.

I get 1.5 to 2.5 % drain per hour in idle, gps wifi and data off, aod on, sometimes even 0.9% per hour overnight

battery dead or?

Well bought this phone back in mid 2017,and because of sickness I haven't used it that much at all.
I charged the battery 11 times so far and was keeping the phone in a desk drawer.
A month ago I noticed that the phone won't turn on,so I plug the charger on and charged the battery to 100 %.
I supposed that the phone was on,I didn't turn it off,and the battery left to 0% and shutdown the phone.
I really can't say how long it was on 0% (suppose like maybe a month).
Today I noticed very bad battery results.
Batterylife with GSam Battery Monitor is around 12 h only.
Was the "bolded text" the reason that battery died or the reason was not using the phone for 2 years?
Is there a software to check the damage of the battery?
I installed accubattery pro but for some reason doesn't offer me Health status of battery.

paparazzo79 said:
Well bought this phone back in mid 2017,and because of sickness I haven't used it that much at all.
I charged the battery 11 times so far and was keeping the phone in a desk drawer.
A month ago I noticed that the phone won't turn on,so I plug the charger on and charged the battery to 100 %.
I supposed that the phone was on,I didn't turn it off,and the battery left to 0% and shutdown the phone.
I really can't say how long it was on 0% (suppose like maybe a month).
Today I noticed very bad battery results.
Batterylife with GSam Battery Monitor is around 12 h only.
Was the "bolded text" the reason that battery died or the reason was not using the phone for 2 years?
Is there a software to check the damage of the battery?
I installed accubattery pro but for some reason doesn't offer me Health status of battery.
Click to expand...
Click to collapse
I would give the battery a few full cycles to see it that sorts it or yes, the battery it would seem is on its last legs. I don't know what app to recommend as an alternative though. (My battery is 23 months old and still performs as it did when I brought the phone)

I would drain it to 5% (maybe 1%) then charge it to 100% (without using phone while charging) a few times.
Then see how it goes. Afterwards charge phone from 20% or 15%.

Ok.I will charge it to 100% and report you with results with duration time on battery and you tell me how bad is it

GSam Monitor:
Battery Life: 3d 19.9h (5h 26m active)
Screen On:3h 40m (1h 17m Max)
In Android: battery estimated battery life: 2d 1h