USB mobile phone AC adapter 1,Buit-in battery:Li-Polymer. 2 ... adapterIt is a battery, ac adapter, and also a car charger.with buit-in battery, which capacity is 1000mAh--it is a battery. ... with ac adapter, which can be plugged in the ... power socket, for your mobile phone charging--it is a ac adapter.with car charger, you can charge for your ...