My battery is low. I need to re-charge my mobile.

我的电池要没电了。我需要给我的手机充电。

A         I can only speak for a few minutes. My battery is low.

A    我只能说几分钟。我的电池要没电了。

B         Don’t worry. Call me back later.

B    别担心。待会再给我打回来。

A         Ok. I’ll call you back in an hour. I need to re-charge my mobile.

A         好的。我一小时后给你打过去。我需要给手机充电。

B         No problem. Speak to you later.

B    没问题。待会再聊。

When you are talking about your phone, you also talk about its power and the battery.

当你谈论手机时，你可以谈论手机的电源或者电池。