The Trimble GeoExplorer 6000 series handheld ships with a rechargeable battery pack, which can also be purchased separately as a spare or replacement battery. With an additional, fully-charged GeoExplorer 6000 series battery pack on hand, you can swap battery packs in the field in a matter of seconds to continue working. The battery pack integrates a 2500 mAH Li-Ion battery with smart charging circuitry and convenient capacity remaining LED indicators. Note: This battery pack is compatible with the GeoExplorer 6000 series AC Power Supply