Starter set: 2x ProCORE18V 4.0Ah + GAL 18V-40. This starter set offers the performance of a standard 18V battery in a very compact and lightweight design. The ProCORE18V 4.0Ah is equipped with our latest cell technology, the 21700 cells. As a result, this battery is more compact and lighter than a standard 18V 4.0Ah battery. For extended lifespan and runtime, this ProCORE18V battery features our COOLPACK 2.0 technology for excellent heat management. The compact charger GAL 18V-40 charges the ProCORE18V 4.0Ah battery to 80% in just 48 minutes. Since 2008, all our batteries have been compatible with both new and existing Bosch Professional tools within the same voltage class. The ProCORE18V 4.0Ah comes with a high-resolution charge level indicator with 5 LEDs. Included in the package: cardboard box, 2x ProCORE18V 4.0Ah batteries, fast charger GAL 18V-40 Professional.