Samsung BST2818SAB/STD Battery by Amstron is designed for use with Samsung SGH-E315, SGH-E316, and SGH-E317 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 850mAh Capacity • Warranty: 4 Years