This battery-kit (Neosonic-Polymer 5300mAH) for FleetPC-9/FleetPC-9-B/FleetPC-10 is connected with only one cable to the mainboard of FleetPC-9/FleetPC-9-B/FleetPC-10. The battery gets automatically charged by the system. On power shortage, it can leave the the Car-PC running for 10 minutes.