GBM4X1 supplies replacement main power for the Getac T800 when the AC adapter is not connected or charging. This lithium-ion battery provides 7.4 V, 4,100 mAh capacity, and 31.08 Wh of stored energy in a 215 g battery pack. It is intended as a spare main battery for T800 tablet deployments that need a replacement or additional power pack. A battery icon on the back of the pack changes appearance to show the current battery state. When the battery is low, it alerts users to take action, providing a visible reminder to maintain battery performance. The pack serves as the device’s main power source away from connected AC power. For T800 deployments where battery condition needs to be checked before or during mobile operation, this replacement pack provides the published capacity and rear status indication in the T800 battery format. Order code GBM4X1 identifies the lithium-ion T800 main battery with 7.4 V, 4,100 mAh capacity.