... ! *Simple, reuseable power *USB battery = rechargeable battery + battery charger *1.2 V USB Rechargeable AA Battery1)Built in intelligent charger, charge ... in your MP3, controller, PDA, etc. (1450mah,1.2v)How to charge:1)Charge by powered USB(about 5 and half Hours ... strip the cap off,put into charger directly as common rechargeable batteries. Caution:Observe the correct polarity before use.Dont dispose ...