Starter kit for powering a wide range of Sthor 20V system battery devices.The kit includes:4 Ah battery2 Ah battery2A chargerThe charger is capable of charging the battery in 60 minutes (2Ah) and 120 minutes (4Ah). The device will automatically disconnect when fully charged and has a diagnostic function. If the cells are damaged, it will interrupt charging and indicate with a flashing red LED the need to replace the battery.