GBM4X5 is a B360 spare main battery that provides the device’s main power source when an AC adapter is not connected. Its lithium-ion 3S1P design delivers 7.72 V output with 4,060 mAh typical capacity and 3,857 mAh minimum capacity, giving B360 users a dedicated replacement or spare power component. An integrated LED power indicator and status check button let users identify battery capacity status with a button press. The battery measures 141.05 x 74.3 x 10.1 mm and weighs 154 g, supporting a compact spare-battery deployment. Use this battery with the B360 where maintaining a main power source away from AC power is required. Order GBM4X5 for the B360 spare main battery with LED capacity-status indication and the specified 7.72 V lithium-ion output.