USB mobile phone AC adapter 1,Buit-in battery:Li-Polymer. 2,Output: ... AC 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 ac power socket, for your mobile phone charging--it is a ac adapter.with car ... LED indicator lights to show that the actual power