Completely FREE and OPEN SOURCE battery monitoring widget. Shows graph of battery usage over time and allows your to monitor your battery usage.

Now with the ability to monitor the battery level of your Android Wear watch as well!

On Android Lollipop devices, has the ability to graph battery current (i.e. instantaneous usage) in milli-amperes, and battery energy level, in milli-watt hours.

Source code here: https://github.com/codeka/advbatterygraph

完全免费且开放源代码的电池监控小工具。显示电池使用的图形随着时间的推移，让你监视你的电池使用情况。

现在有监控你的Andr​​oid磨损手表的电池电量以及能力！

在Android棒棒糖设备，具有图形化的电池电流（即瞬间施放）在毫安，电池和能量水平，在毫瓦特小时的能力。

这里的源代码：https://github.com/codeka/advbatterygraph