The new BD 1800 Rechargeable Battery and Charger represents the cutting edge of modular battery pack technology. Designed for use with the Sprinter275 and ReVolt350 headlamps, this 1800 mAh Lithium-Ion battery provides dependable, long-lasting power for all your outdoor adventures. Included with a convenient USB charger, it ensures you stay illuminated during runs, climbs, and treks.Black Diamond BD 1800 Battery & Charger Features: Charger included 1800 mA-hr Lithium ion of rechargeable power Dual-Fuel: Maximum flexibility to utilize either the rechargeable lithium ion BD 1800 Battery or Alkaline cells. Currently compatible with ReVolt 350 and Sprinter 275 headlamps ReVolt 350 Headlamp and Sprinter 275 Headlamp sold seperately