To Charge A Battery
To Recharge, To Recharge A Battery
する verb
If 充電 is a recharge then the verb version is going to be to recharge or to charge a battery.
The reading comes from 充電.
充電するのを忘れたから携帯の電源が切れて、目覚ましが鳴らなかったんだ。
I forgot to charge my battery and my cellphone died, so my alarm didn’t go off.