Progo Brand NP-BN1 Professional Li-Ion Rechargeable Digital Camera Battery with Battery Case for SONY DSC-W390,DSC-W390S,DSC-W390B, DSCW390S, DSCW390B Progo Brand Battery, 100% Compatible with original manufacturer equipments, guaranteed! Integrated microchip prevents overcharging, overheat & provide short circuit protection. High quality Li-Ion battery cell. 960 mAh Capacity Absolutely no memory effect so that you can charge battery at anytime 12 months USA warranty