Product information, new cell technology with the same performance as an 18 V/4.0-AH standard battery for optimized dimensions and less weight, extremely fast charging time for all 18 V batteries, compatible with all Bosch Professional 18-V tools and chargers ( Flexible Power System) , Loading time at battery capacity 4.0 AH (100 %) approx.: 65 min, loading time with battery capacity 4.0 AH (80 %) approx.: 48 min