Kyocera TXBAT10047 Battery by Amstron is designed for use with Kyocera SoHo KX1, KX1, KX1i, KX1v, K4130 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 600mAh Capacity • Warranty: 4 Years