This Bosch GBA Battery & Charger Starter Kit contains: 1 x 12V GBA Battery 18V 2.0Ah Li-ion. 1 x 12V GBA Battery 18V 4.0Ah Li-ion. The Bosch GBA 12V Professional Li-ion Battery has a compact design. It has an optimised battery capacity suitable for most 12V power tool applications. Compatible with all Bosch Professional 12V tools and chargers (Professional 12V System) 1 x 12V GAL 12V-40 Professional Fast Charger. Provides a rapid charging speed for all 12V batteries. Charges a 12V 3.0Ah battery from 0 to 80% in only 36 minutes. It also has a modern and compact design. The GAL 12V-40 also features a wall-mounting option. Compatible with all Bosch Professional 12 V batteries (Professional 12V System) .