Doesn't work on Huawei MediaPad 10 FHD

```
This is because current value is in 
/sys/class/power_supply/MainBattery/current_now not in 
/sys/class/power_supply/battery/current_now. Moreover, units are milliamps.

Build.MODEL is "MediaPad 10 FHD".

```

Original issue reported on code.google.com by `kostya.l...@gmail.com` on 27 Sep 2014 at 5:52
