This AC charger is designed exclusively for charging Tamiya LF-6.6V Batteries. Using the AC100V outlet as a power source, this charger uses a single switch for operation and features safe and secure charging of batteries. Charging progress and errors can be checked via the LED indicator to protect the charger and battery. This charger will charge Tamiya LF2200-6.6V Racing Pack in approximately 70 minutes and LF1100-6.6V Racing Pack (M-size) in approximately 35 minutes.