"This DEWALT One Hour Charge With Automatic Tune Up charges all your DEWALT 7.2-18V battery-operated cordless tools. Charges in 1 hour or less. 3-stage charging system maximizes run time and extends battery life. Battery thermal protection and LED indicators. Battery Charging Time hrs. 1, LED Indicators Yes, Automatic Tune-Up Yes, Thermal Protector Yes, Volts 7.2-18. Charges all DEWALT 7.2V - 18V batteries except Univolt batteries so users need only one charger for multiple cordless products Charges the battery in 1 hour or less thus minimizing down time The DEWALT 3-stage charging system provides maximum run-time and extends overall life of the battery Battery thermal protection system prevents charging batteries that are too hot or too cold which would cause damage to the battery and a loss of run-time Diagnostics with LED indicator are 5 indicators to communicate battery charge status charged, charging, power line problem, replace pack, and battery too hot or too cold Compatible with All 7.2-18 Volt batteries except for Univolt batteries"