SDENEL11 Rechargeable Lithium-Ion Ultra High Capacity Battery Pack (3.7v 800mAh) Replacement for Nikon EN-EL11 Battery Replacement battery for the Nikon ENEL11, Lithium-Ion (Li-ion) 3.7V (800mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark