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My Phone goes in turn off mode when battery is 4% (Forget this issue, It is calibration issue with Z10 & Battery ) But every time when I connect to charger no matter how much time i connect it with charger the battery remain at 5-9% ( & goes downwards either charging is connected or not) untill i reconnect the charger. already tried using different OSs first i was on 10.2.1 now using 10.3 but still with the same issue... can anybody tell me what is the solution of this irritating problem.
You may try this one trick that works on my STL100-1:
1. Turn OFF your phone by pressing and holding the power/lock button on top until the device shuts down.
2. Remove the battery.
3. Plug your charger to an AC socket and the other end, to your phone's USB/charging port (as if you're charging your phone normally).
4. After about 5 seconds, remove the charger, put back the battery, and turn ON your device.
5. At this point, your device should display the real percentage of your battery.
If it still doesn't work, then I suggest getting a new LS1 battery for your Z10.