User Benefit A further 25% increase in runtime (cf. with 4.0 Ah battery) CoolPack technology for up to 100% longer lifetime (cf. battery without CoolPack) Bosch flexible power system - battery suitable for all tools in one voltage class The Bosch GAL18V-40 1600A019RK charger has a modern compact design. With an optimised charging speed for compact 18V batteries, charges a 18V 2.0Ah battery in 24 minutes to 80%. 100% compatible with all Bosch professional 18V batteries. Features and Benefits: Compact: Due to its modern design it is very compact. Optimised charging speed: Optimised charging speed for compact 18 V batteries as it charges a 18 V 2.0 Ah battery in 24 mins to 80%. Professional 18V System: 100% compatible with all Bosch Professional 18 V batteries.