A rechargeable battery that is compatible with all Black Diamond Dual Fuel headlamps and lanterns. Comes with a USB charger and is a 1500 mAh Li-ion rechargeable cell, giving you the freedom of reliable light you can use again and again while running, climbing and trekking in the mountains. Product Code: EATLX5TI0160 Black Diamond BD 1500 Battery and Charger | Head Torches UK