This Wasabi Power battery replaces the Sony NP-BX1 or NP-BX1/M8 battery pack. This battery features 1300mAh which provides a longer run-time between charges. It is made with premium Grade A cells to provide maximum battery life and also comes with a 3-year manufacturer warranty. Additionally, the Wasabi Power NPBX1 is completely compatible with all Sony original equipment including the Sony charger.