CPH-400U - NiMh, 3.6 Volt, 1500 mAh, Ultra Hi-Capacity Battery - Replacement Battery for HUWEI HGB-15AAX3 Cordless Phone Battery NiMh, 3.6 Volt, 1500 mAh, Replacement Battery for HUWEI HGB-15AAX3 Cordless Phone Battery Made with high quality Japanese cells. 100% compatible with your OEM battery. 1 year warranty