CTA Digital DB-ENEL11 EN-EL11 Rechargeable Lithium-Ion Battery (850mAh, 3.7V) Replacement for Nikon EN-EL11 Battery Replaces The Nikon En-El11 Battery 850mAh, 3.7V Retains full capacity, free from memory effect Lithium-ion for maximum battery life power 3 Year Warranty