Siemens EBA-670 Battery by Amstron is designed for use with Siemens C65, CF62, and CFX65 cell phone models. Amstron cell phone batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility, and safety to exceed original equipment manufacturer specifications. • Chemistry: Li-Ion • Ratings 3.7 Volts 550mAh Capacity • Warranty: 4 Year