The DeWalt DCB113 XR Li-Ion battery intelligent charger varies the charge rate according to battery type to increase battery pack life. These DeWALT Chargers use an electronically controlled system allowing the battery to be fully charged giving maximum work er charge and extending the life of the battery. A very useful LED charge light indicates charging status, battery temperature and power problems. Charges XR Li-Ion DEWALT 10.8V, 14.4V, 18V Slide Pack batteries. It intelligently adjusts the charge rate based on the battery type, helping to extend battery life. A bright LED indicator keeps you informed of the charging status, displaying whether the battery is charging, fully charged, or experiencing a power problem or temperature issue (too hot or too cold). Compatible with slide-type batteries. Specifications Voltage: 10.8/14.4/18V Battery Chemistry: Li-ion Approximate Charge Time (5.0Ah): 120 minutes Approximate Charge Time (4.0Ah): 100 minutes Approximate Charge Time (3.0Ah): 70 minutes Approximate Charge Time (2.0Ah): 50 minutes