Restart the phone and suddenly battery has half of the juice!

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Hi all, as the description says it's quite weird. While I have let's say 56% battery and for some reason I restart the phone, then suddenly after booting it show I have 18%!!! (screenshot attached)



I have latest 4.0.4 official UK unbranded firmware and it happened on 4.0.3 too. I have tried factory reset and doing a battery cycle.

Could it be a pure battery problem or may it be a bug? Anyone else has this problem?

Sent from my GT-I9100 using xda app-developers app

I also have this problem... It's a huge issue for me! Constantly having to recharge! grrrrrr!

I'm running 4.0.3 UHLPK

Have you tried recharging to 100%, taking battery out for at least 3 mins (180 secs), then allowing full discharge?

Originally Posted by oddlyshapedstickman

Have you tried recharging to 100%, taking battery out for at least 3 mins (180 secs), then allowing full discharge?

Yep tried that. Tried anything I can think of.

Yes I have tried all those battery tips in general...even tried to leave the battery disconnected from the phone for one night after doing a full discharge and them charge with the device turned off.

Sent from my GT-I9100 using xda app-developers app

Originally Posted by Urannous

Hi all, as the description says it's quite weird. While I have let's say 56% battery and for some reason I restart the phone, then suddenly after booting it show I have 18%!!! (screenshot attached)

Attachment 1288706

I have latest 4.0.4 official UK unbranded firmware and it happened on 4.0.3 too. I have tried factory reset and doing a battery cycle.

Could it be a pure battery problem or may it be a bug? Anyone else has this problem?

Sent from my GT-I9100 using xda app-developers app

It's normal. The fuel guage chip in GSII doesn't need calibration, but the downside is sometimes after rebooting below 60-50% battery it can show wrong battery info.The battery still has power just reporting is wrong. If you wait for sometime you'll see the battery climbing back to pre reboot state.

So DON'T PANIC normal operation.

Restarting the phone resets the fuel gauge. If you leave it for a while, the battery will come back

Thanks for the replies!