This 12V Max charger gets the user power ready in a hurry. The Bosch GAL12V-20 Lithium-ion charger can fully charge a spent 12V Max 2.0 Ah Lithium-ion battery in approximately one hour, and it is compatible with Bosch 12V Max Lithium-ion batteries. This means that users are ready to get back to work with little downtime. It is engineered with regulated 80/20 dual-mode charging for fast and secure operation. Regulated dual-mode charge delivers an 80 percent in fast-charging mode, slows to 20 percent in long-life mode. The charger features indicator lights showing when the battery is charging, finished charging or pending charging due to high temperatures.