Replacement Sony NP-BG1 battery provided by AtBatt.com features Lithium-Ion technology that provides maximum battery life and power. Amstron Power Solutions manufactures and delivers high-quality and high-performance batteries and chargers. Amstron batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. • Chemistry: Li-Ion • Rating: 3.7V 960mAh • Warranty: 4 Year