The Bosch GAL 18V-40 gets users power ready with no downtime. This compact charger has a charging current of 4.0 amperes and features intelligent regulated dual-mode charging - the first 80% of charge is fast, remaining 20% in long-life mode to prolongthe life of the battery. The new modern design features an error indicator, alerting users if charging is interrupted due to temperature and/or battery failures. The battery status indicator provides indication of charging mode and when charging is complete.