Don't let dead batteries stop you from filming when you are on a great dive vacation. Having spare fresh charged batteries can make the difference between getting that spectacular footage or just watching the event pass by and left only to memory. Share all the memories of your spectacular dives. Ni-MH rechargeable battery pack, mounted inside the solid built aluminum canister for ruggedness and durability. Canister is equipped with all hardware connections and has an anti-corrosive anodize coating.