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ORIGINAL SONY PRODUCT
About this item High capacity for long life, approx.2.2 times of the NP-FW50 Electrical capacity of 16.4Wh (7.2V/2280mAh). Dimensions (W × H × D): Approx. 38.7 x 22.7 x 51.7 mm (1.56 x 0.91 x 2.13) iNFOlithium enables remaining charge display on camera LCD screen. Weight: 3.0 ounces
EXPENSIVE BUT IT IS BEST TO AVOID THIRD PARTY BATTERIES