The Dewalt DW0246 24-volt battery charger does much more than simply recharge batteries. This state-of-the-art electronic device is a sophisticated diagnostics tool that ensures you get absolute peak performance, ultimate power output and the longest possible life from your Dewalt 24-volt batteries. The fast one-hour charger features: a fan-cooled technology that increases the run-time and number of recharges; thermal protection to prevent charging batteries that are too cold or too hot, which could damage the batteries; and three-stage charging system to provide maximum run-time. There?s also a five-LED indicator, which communicates the charge status: fully charged, charging, power line problems, replace pack, and battery too hot or too cold. The DW0246 is compatible with all Dewalt 24-volt batteries. And it?s backed by Dewalt?s three-year limited warranty, 90-day money-back guarantee, and one-year free service contract.