GBS4X1 is a SnapBack extension battery that snaps onto the Getac T800 as a second battery pack, providing extra battery power without a separate external power connection. The lithium-ion pack has a typical capacity of 2,100 mAh at a nominal 14.8 V and weighs 285 g. An integrated LED indicates estimated battery charge. Press the battery button to view the number of green segments illuminated, enabling an at-a-glance charge check directly on the pack. This pack-mounted indicator keeps charge information available when checking the attached battery. Built for use with the Getac T800, this extension battery provides an additional power source for T800 deployments. Its snap-on design adds a second battery pack to the device, while the 285 g pack combines extra power with an integrated charge-status check. Order code GBS4X1 identifies the SnapBack extension battery configuration with LED charge-status indication.