APC Smart-UPS Charge Mobile Battery is a lithium-ion battery system designed to power Microsoft Surface Hub 2 on-the-go for over 100 minutes, so you stay connected regardless of the location. LED status indicators Quickly understand unit & power status with visual indicators. Lithium-ion battery Lithium-ion batteries provide twice the service life of a typical lead acid battery & are small, light & environmentally friendly. USB (Universal Serial Bus) connection Use your PC to access additional power protection & management features for your UPS via a USB (Universal Serial Bus) port.