Z CAM E1 battery for cameras. Model BT1. These batteries are genuine and original Z CAM. Battery specifications Voltage: 3.7V Amps: 2000mAh Watt Hours: 7.4Wh. The battery is rechargable with the E1 camera body or Z CAM DC1 charger. Z CAM DC1 Charger is also available to purchase. If your battery is old and running low on power or damaged, this is the proper and only solution for you camera to work properly and be safe.