The DEWALT DCB119 XR Universal Li-Ion Car Charger charges all XR Li-Ion DEWALT 10.8, 14.4, 18 Volt slide pack batteries. It uses the DEWALT 2 stage charging system. The intelligent charger varies the charge rate according to battery type to increase battery pack life. The diagnostics with bright LED indicator communicates the battery charge status: charged, charging, power problem, and battery too hot or too cold. Voltage: 10.8/14.4/18 Volt. Battery chemistry: Li-Ion. Charging Current: 2.5 Amp.