当你电话打到一半时，手机突然关机了，这时候你意识到手机没电了。充完电后你要跟对方解释，“我手机没电了”，那么英语要怎么表达呢？
最常用的NO.1表达方法：
die/dead
My phone is dying. I need to charge it immediately.
My phone is almost dead. I need to charge it immediately.
我手机没电了，我要赶紧充电。
My battery's dying... let me call you back later. 我手机电池快没电了，我晚点给你回电话。
I'm sorry I didn't reply to your text - my phone died. 不好意思没回你信息，我手机刚才没电了。
Why does my phone battery die so fast? 为什么我手机这么快没电？
NO.2
run down
The battery has run down. 电池没电了。
If you leave your flashlights on, you'll soon run down the battery. 如果你没关手电筒，很快电池就会没电。
He left the car lights on and run down the battery. 他忘了关车灯，把电池用光了。
NO.3
run out (of)
My battery runs out quickly. 我电池很快没电。
I ran out of battery/power on my way to work today. 我今天上班的路上把手机用没电了。
My cellphone's battery has almost run out. Can you charge it for me?" 我手机快没电了，你能帮我充一下吗？
NO.4
(run) low
my battery is getting low. 我电池快没电了。
Be sure to plug it in if you are running low on battery.
电池电量降低时要充电。
NO.5
(run) out of juice（偏英式）
My laptop's out of juice. This is so frustrating. 我笔记本电脑没电了，真令人沮丧。
NO.6
(go) flat（偏英式）
My car battery has gone flat. 我汽车的电池没电了。
其他相关表达：
给手机充电：charge a phone
充电器：phone charger
充满电：be fully charged/reach a full charge
插上/拔下手机充电插头：plug in/unplug your phone
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