This Bosch Blue Kit includes: 1 x 5.0Ah GBA 18V LI-ION Battery 1 x GAL 18V-40 Fast Charger GBA 18V 5.0AH Li-ION Battery The 5.0ah 18V Lithium-ion battery has Electronic Cell Protection (ECP) which protects the battery from overload and increases lifetime. It also has Bosch Cool Pack technology which reduces heat build-up within the battery and prevents it from overheating therefore increasing its lifetime. The 18V-LI 5.0Ah battery is compatible with all Bosch 18 V Li-ion power tools, radios and more and features an additional 25 percent more run time compared to Bosch 18V 4.0Ah battery. GAL 18V-40 Fast Charger The Bosch GAL 18V-40 is a compact charger and features intelligent regulated dual-mode charging - the first 80% of charge is fast, remaining 20% in long-life mode. This process extends the lifetime of the battery pack. A 5.0ah battery is charged 80% in 60min. The new modern design features an error indicator, alerting users if charging is interrupted due to temperature and/or battery failures. The battery status indicator provides indication of charging mode and when charging is complete.100% compatible with all Bosch Professional 18 V batteries.