The smallest 12V rechargeable battery pack in the world! Compatible with our custom battery charger, this pack features a 2.1 mm DC connector for direct connection with most Bullet cameras on the market. Very small and lightweight, but still capable of powering our cams for 3 to 4 hours before it needs re-charging. Uses NiMh battery cells, which are immune to "memory" problems that are commonly found on other battery packs.