Newmowa NP-BY1 Battery (2-Pack) and Charger kit for Sony NP-BY1 and Sony HDR-AZ1 Includes 2 batteries and 1 charger for the Sony NP-BY1 Each NP-BY1 battery features 3.7V, 640mAh Mini rapid A/C charger features a fold-out US plug, 110-240V worldwide input voltage, car charging adapter, and European plug Batteries and charger are fully compatible with Sony camera Please refer to the picture instruction when put the battery into the camera and all items include a 2-year manufacturer warranty