battery life
noun [ C ] uk/ˈbæt.ər.i ˌlaɪf/ us/ˈbæt̬.ɚ.i ˌlaɪf/
电池寿命，电池使用时间
the length of time a device can continue to work before it needs its battery to be recharged (= to have more power put into it)
My new phone has a much longer battery life. 我新手机的电池寿命更长。