[Q] Battery uncalibrated

[raptor402]

Hello, forum

I'm running my OPO on PA 4.6. Over the past few weeks, the battery has lost calibration. It dies at 25% and remains at 100% for quite a while. How can I fix this? I'm open to wiping and reflashing.

Thanks
Raptor

 

[Heisenberg]

Just try using a battery calibration app.

Transmitted via Bacon

 

[raptor402]

Just try using a battery calibration app.

Transmitted via Bacon

Thanks for your response! The battery calibration app did the trick initially. However, a few days later, the issue seems to be returning. I've decided to just move on to Lollipop.

Once again, thank you.

Raptor

 

[yuval48]

Thanks for your response! The battery calibration app did the trick initially. However, a few days later, the issue seems to be returning. I've decided to just move on to Lollipop.

Once again, thank you.

Raptor

did it help?

 

[nitrobg]

The same happens to me. I'm using the latest Sultan CM13. I'm trying to do a full recalibration - drain it until it refuses to turn on, keep it on the charger for 6+ hours without turning it on (black battery screen) and then repeat the procedure few times. I have some average success and the phone shuts down at about 10% instead of 50-60% but it doesn't seem to be perfectly calibrated just yet.

 

[Heisenberg]

The same happens to me. I'm using the latest Sultan CM13. I'm trying to do a full recalibration - drain it until it refuses to turn on, keep it on the charger for 6+ hours without turning it on (black battery screen) and then repeat the procedure few times. I have some average success and the phone shuts down at about 10% instead of 50-60% but it doesn't seem to be perfectly calibrated just yet.

I'm not sure if you're aware, but you're doing some of the worst things you can do to a lithium battery. You should never completely discharge a lithium battery, and you should also refrain from keeping it at peak voltage (connected to charger once charging is complete). If you've done this a few times I'm not at all surprised that the thing shuts off at 10%, you're basically killing the battery and have depleted its overall health and life.

 

[nitrobg]

I'm not sure if you're aware, but you're doing some of the worst things you can do to a lithium battery. You should never completely discharge a lithium battery, and you should also refrain from keeping it at peak voltage (connected to charger once charging is complete). If you've done this a few times I'm not at all surprised that the thing shuts off at 10%, you're basically killing the battery and have depleted its overall health and life.

I'm fairly sure that the battery has safety measures that prevents it from completely discharging or overcharging. When the battery is discharged, the phone actually turns on and says that the voltage is too low. Above 80% the phone also enters slow charging mode that takes hours to reach 100%.
Also, I'd rather kill my battery a bit faster (an original replacement battery costs just $10) instead of having a miscalibrated battery that could die whenever I need it.

 

[Heisenberg]

I'm fairly sure that the battery has safety measures that prevents it from completely discharging or overcharging. When the battery is discharged, the phone actually turns on and says that the voltage is too low. Above 80% the phone also enters slow charging mode that takes hours to reach 100%.
Also, I'd rather kill my battery a bit faster (an original replacement battery costs just $10) instead of having a miscalibrated battery that could die whenever I need it.

Yeah, but by forcing it to drain until it won't turn on you're bypassing that safeguard. The safeguard is the phone switching off before you can discharge it too far. Your phone shouldn't take hours to go from 80% to 100%, that's another sign of bad battery health. If you keep doing these things the battery will be so bad that it will die completely randomly and at random percentages. By using these methods you're going to bring on much sooner the very situation that you're trying to avoid, only much worse. The correct way to calibrate a lithium battery is the following:

1. Charge to 100%
2. Discharge to 5%-10%
3. Charge to 100%

No need to force it to discharge further than is safe, no need to keep it on the charger longer than is necessary (which is pointless anyway), and it only needs to be performed once every month or so.

 

[nitrobg]

Yeah, but by forcing it to drain until it won't turn on you're bypassing that safeguard. The safeguard is the phone switching off before you can discharge it too far. Your phone shouldn't take hours to go from 80% to 100%, that's another sign of bad battery health. If you keep doing these things the battery will be so bad that it will die completely randomly and at random percentages. By using these methods you're going to bring on much sooner the very situation that you're trying to avoid, only much worse. The correct way to calibrate a lithium battery is the following:

1. Charge to 100%
2. Discharge to 5%-10%
3. Charge to 100%

No need to force it to discharge further than is safe, no need to keep it on the charger longer than is necessary (which is pointless anyway), and it only needs to be performed once every month or so.

The device is turning on, just refusing to boot. You can't really bypass the safeguard, it is always there.
The slow charging phase after 75-80% is a normal function for all modern devices. You could check this review for more information.

I would do the procedure you are talking about but the reported 100% charge is not actually 100% until the device stays on the charger for hours. Otherwise it dies at 40-50% and refuses to boot up. Even if I charge it for hours, it would take a couple of hours or even a day for the battery to report below 100% charge. It could last an entire day with 100% charge and die at 50% the next day. I can never be sure what's the real charge of the battery, this is why I am willing to sacrifice a part of its life just to get a proper reading.

 

[nitrobg]

Short charges tend to miscalibrate the battery... The phone was at 100% for about 24h, it will probably die at about 50%.

 

[raptor402]

Using a battery recalibration works for me. However, every few weeks, I have to recalibrate the battery again. The recalibration process is pretty simple: recharge the battery to 100% and use the app. No need to drain the battery completely after that. Regular use fixes the battery over a few days.

 

[yuval48]

Using a battery recalibration works for me. However, every few weeks, I have to recalibrate the battery again. The recalibration process is pretty simple: recharge the battery to 100% and use the app. No need to drain the battery completely after that. Regular use fixes the battery over a few days.

which app exactly? root needed?

Sent from my A0001 using Tapatalk

 

[raptor402]

which app exactly? root needed?

Sent from my A0001 using Tapatalk

The app is Battery Calibration by NeMa. Root needed.

 

[yuval48]

Using a battery recalibration works for me. However, every few weeks, I have to recalibrate the battery again. The recalibration process is pretty simple: recharge the battery to 100% and use the app. No need to drain the battery completely after that. Regular use fixes the battery over a few days.

so i tried it, but today my opo died at 19%.
how can you be sure that "Regular use fixes the battery over a few days"?
i mean, if today ill recalibrate, when(%) should i recharge? i cant be sure if the phone will die at 20%,10% or 1%..

 

[Neroga]

I posted this somewhere a few days ago..

Turn the device off completely then plug it in. A battery indicator should appear on the screen. Don't turn the device on until it reads 100%. Once it's fully charged, power on the device and leave it plugged in until it's fully booted. All should be well.

Battery calibration apps are mainly for Android emulators on PC to get the Android "battery" indicator to match up with laptops. There are no benefits of running one on an Android device and will actually mess up the calibration MORE unless you use it in tandem with the steps above. Still pointless to use it, though.

 

[yuval48]

I posted this somewhere a few days ago..

Turn the device off completely then plug it in. A battery indicator should appear on the screen. Don't turn the device on until it reads 100%. Once it's fully charged, power on the device and leave it plugged in until it's fully booted. All should be well.

Battery calibration apps are mainly for Android emulators on PC to get the Android "battery" indicator to match up with laptops. There are no benefits of running one on an Android device and will actually mess up the calibration MORE unless you use it in tandem with the steps above. Still pointless to use it, though.

ok it seems to work, but when the battery reached 20+% is suddenly dropped down to 10% (also when i charged it, went up from 10% to 20%)

 

[Neroga]

ok it seems to work, but when the battery reached 20+% is suddenly dropped down to 10% (also when i charged it, went up from 10% to 20%)

Do it, again. Sometimes it takes a few tries. Better if you let your device get down to ~20% then do it.