CTA Digital DB-CANP80 NP-80 Rechargeable Lithium-Ion Battery (850mAh, 3.6V) Replacement for Casio NP-80 Battery Replaces The Casio Np-80 Battery 850mAh, 3.6V Retains full capacity, free from memory effect Lithium-ion for maximum battery life power 3 Year Warranty