SEA DRAGON UNDERWATER LIGHTS LI-ION RECHARGEABLE BATTERY Rechargeable lithium ion battery (7.4 volt, 3400 mAh, 25Wh) for Sea Dragon Fluoro-Dual Beam, 1200, 1500, 2000, 2100SF, 2300 Auto, 2500, and 3000 Auto Photo/Video/Dive Lights. Includes protective cap.Keep a spare battery charged so you never miss an opportunity to capture that perfect shot.SeaLife's Batteries have been designed to work best in SeaLife Cameras and Lights. Do not attempt to substitute the battery or charging device with other types or brands, all SeaLife battery and charger items have been tested to the full specified run time for each item. Note: Using alternate non-SeaLife spec. batteries will affect your camera a or light’s performance and can also be fire hazard.