Karcher HV 1/1 BP FS Fast Battery Charger 18v Fast charger 2.445-036.0 quickly charges any Karcher 18v battery to 80%. Able to charge the 2.5Ah battery to 80% within 44 minutes and the 5.0Ah battery within 90 minutes, the fast charger allows you to quickly get back to your cleaning or gardening task. Features - Quick Charger - Wall Mount Product fits various Karcher Professional Battery products.