CTA Digital DB-BD1, Rechargeable Lithium-Ion Battery (680mAh, 3.6V) Replacement for Sony NP-BD1 and NP-FD1 Battery Replaces The Sony Sony NP-BD1 or NP-FD1 Battery 680mAh, 3.6V Retains full capacity, free from memory effect Lithium-ion for maximum battery life power 3 Year Warranty