Kinamax 3900mAh NP-FV100 Replacement Battery for Sony HDR-HC9, HDR-XR150, HDR-XR350, HDR-XR550 - Premium Japanese Cells Ultra high 3900 mAh power -- the higher the mAh rating, the more power a battery will store and the longer it will last Manufactured using premium Japanese grade A battery cells Includes a 3-year warranty