Replacement Battery for Battery for Yealink CP930 Series Conference Phone Replacement Lithium-ion Battery part number 300-10186 (3.6V/3.7V/4.2V) . Capacity: 7800mAh/28.86WH. Compatible with Yealink CP930, CP930W, CP930WP Conference Phone Professional Battery Management System (BMS) provides multiple protections for over charge, over discharge, short circuit, over voltage, over-current and over heat. 3.6V/3.7V/4.2V 28.86Wh 7800mAh are same with original voltage and battery capacity. Easy to install, local after sale team guaranteed 7/24 response to online messages, 12 months warranty.