iOS 8.1+ Battery drainage problem.

i have found problem iphone 5s. seem drain faster ios 7 era.
standby, after full charge on night. unplugged , go sleep.
after wake up, , found battery has 66%. seen on picture 1-4.

what have try :
1 have full restore, setup new phone, full restore in dfu mode, full restore other mac etc. <- no change.
2 disable feature such background app refresh, location service, push mail. <- no change
3 after seen "phone low signal". try put iphone in airplane mode, drainage hasn't stop.

please me fix problem.

first night : full charge @ 2:54


8 hour later, after wake up. please notice show "phone low signal" in situation iphone got full of signal (rssi~77);


second night :

 

amethyst said: ↑

i have found problem iphone 5s. seem drain faster ios 7 era.
standby, after full charge on night. unplugged , go sleep.
after wake up, , found battery has 66%. seen on picture 1-4.

what have try :
1 have full restore, setup new phone, full restore in dfu mode, full restore other mac etc. <- no change.
2 disable feature such background app refresh, location service, push mail. <- no change
3 after seen "phone low signal". try put iphone in airplane mode, drainage hasn't stop.

please me fix problem.

first night : full charge @ 2:54
image

8 hour later, after wake up. please notice show "phone low signal" in situation iphone got full of signal (rssi~77);
image

second night :
image

image

click expand...

have had low signal phone? appears draining battery. placing in area signal weakest? try different placement.

 

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