The IMPRES smart energy system in this six-unit charger ensures maximum talk-time and optimum battery life for your Motorola EX series and HT series radios. Using advanced charging algorithms, this system automatically reconditions IMPRES batteries based on actual usage, keeping them in peak condition. You can safely leave batteries on the charger for extended periods, keeping them fully charged when you need them, without subjecting them to heat damage. This 110-volt, rapid-rate charger is designed for use with NiCad, NiMH and Li-Ion batteries.