The Bosch GXS18V-15N15 Starter Kit delivers high power in a compact size for standard to medium-duty applications. The CORE18V 4 Ah Advanced Power Battery is a compact battery delivering power in a lightweight solution. It allows you to get the power and lose the weight. The GBA18V40 delivers high power in a compact size for standard to medium-duty applications. It delivers 2x the runtime and 60% more power compared to BAT612 18V 2 Ah battery. The GBA18V40 has the Bosch-exclusive CoolPack 2.0 technology, which cools the battery faster and helps provide longer lifetime compared to Bosch 18V batteries without CoolPack 2.0. The compact charger gets users power ready fast with a lightweight, compact solution. The Bosch GAL18V-40 Lithium-ion charger has a 4-Amp charging current, delivering 2x the charging current vs. the GAL18V-20 standard charger. It can fully charge a spent CORE18V 4 Ah Lithium-ion battery in 65 minutes. It provides regulated dual-mode charging, which charges a battery fast while maintaining overall battery health. It also has a battery-status indicator. It's compatible with the AMPShare System, a battery system designed to be multi-brand compatible across many cordless products to make managing your work day easier. AMPShare System 18V batteries and chargers are compatible with Bosch 18V power tools and a growing list of cordless products from AMPShare brands.