EN-EL3a Lithium-Ion Battery - Rechargeable Ultra High Capacity (1700 mAh) - replacement for Nikon EN-EL3a Battery for D100 & D70 Cameras Replacement battery for the Nikon ENEL3a, Lithium-Ion (Li-ion) 7.4V (1700mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark