Because of the tall buildings, the battery drains quickly.

高楼遮蔽太多 电池耗得很快。

So app version choice could slow your battery drain.

因此应用程序版本的选择可能会降低电量消耗。

Or whenever you notice your phone battery draining faster or getting hotter than normal.

或者每当你注意到手机电池耗尽速度或变得比正常情况下更热时。

Because it turns out nearly half the battery drain on a phone happens when the screen's not even on.

因为事实上手机电量的消耗几乎有一半是在屏幕关闭的状态下。