... 2 small size light weight 3 Long use time 4 Safe and long cycle life Specifications of small 3 ... .Capacity, 0~20AhApplications: mobile phone,wireless phone,MP3,MP4,bluetooth,speakers,GPS,ebikes, and all possible electronics products. We ... a little or no power ,so please charge it for about 3-4hours before using .when we shipment ,we ... contact us ! 3.7V 800mAh li-polymer battery with factory direct sales