Battery-Biz Inc. Duracell 3.7 Volt Li-Ion digital camera battery Rectangular shaped battery with three contact points on one end 100% OEM compatible Full one year warranty Guaranteed to meet or exceed original specifications Li-Ion 3.7 volt, 650mAh Li-Ion battery Compatible with Sony NP-BD1, NP-FD1 100% OEM compatible No memory effect 3 Year Limited Warranty