Running out of battery on your phone can be a pain when you're waiting for an important call or you're just really eager to see what Kim Kardashian's going to post on Twitter next. If you don't want to carry your charger with you and fight it out for outlet space in a cafe, maybe an external battery pack is for you, but do you know how to deal with a dying battery in Chinese? This lesson will teach you some very useful vocabulary in this regard.