Wasabi Power Sony NP-BG1, NP-FG1 Replacement (Battery) Rechargeable lithium-ion battery for Sony NP-BG1 or NP-FG1 Premium Japanese cells for longer battery life with no memory effect Fully compatible with the Sony camera and charger Rated at 3.7V and 1250mAh for a longer run time than the Sony original Includes NPBG1 battery with 3-year manufacturer warranty