12v Coolpack Starter Set 6.0AhFeatures & Benefits: GBA 12V 6.0Ah: Extremely high battery capacity GAL 12V-40: Rapid charging speed for all 12 V batteries. Charging 12V 6.0Ah batteries from 0 to 80% in 72 min.Typical Application: Compatible with all Bosch Professional 12 V tools (Professional 12V System) 100% 12V and 10.8V compatible