This Bosch GBA Battery & Charger Starter Kit contains: 2 x GBA 18V Batteries 18V 4.0Ah Li-ion. The Bosch GBA Li-ion Battery Pack has a compact design with robust housing and a handy fuel gauge. Bosch CoolPack technology prevents damage from heat concentration to offer superior run time. The special heat-dissipating housing at the base of these Li-ion batteries protects the cells inside from heat damage and is 100% compatible with all Bosch blue Li-ion power tools and chargers within the same voltage group. Up to 100% longer lifetime due to the Bosch CoolPack active temperature management. 1 x GAL 1880 CV Professional Quick Charger with integrated active air-cooling, optimised for Bosch GBA 18 V batteries, leads to a longer lifetime. This fast charger is part of the Bosch Professional 18V System and is 100% compatible with all Bosch Professional 18 V batteries. Also compatible with AMPShare, the multi-brand battery alliance. The Bosch battery starter set includes 2 x GBA 4.0AH lithium-ion Coolpack batteries and 1 x GAL 18V-40 charger which is compatible with all Bosch 18V lithium-ion blue power tools and chargers. Coolpack technology offers 100% more lifetime than a battery with Coolpack technology. Features and Benefits Slide-in interface and large release button for a user friendly experience LED indicators and temperature sensor for clear visibility of status Robust housing with heat conductive material to avoid easy damage.