DEWALT DCB119 12-Volt MAX and 20-Volt MAX Li-Ion Vehicle Battery Charger Charges all DEWALT 12V and 20V MAX Li-Ion batteries from a vehicle's power outlet Enables batteries to be charged while driving to work or on a job site Charges the battery in 1 hour or less, minimizing downtime Automatic shut-off protects excessive discharge of vehicle's battery Diagnostics LED indicator communicates status: charged, charging, power line problem, replace pack, battery too hot or cold