The Bosch GXS18V-11N25 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. The compact charger gets users power ready fast with a lightweight, compact solution. It can fully charge a spent CORE 18V 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. AMP Share System 18V batteries and chargers are compatible with Bosch 18V power tools and a growing list of cordless products from AMPShare brands.