This fast charging solution is ideal for people on the move who need battery power fast. Charges batteries in as little as 1 hour. Voltage and temperature monitoring system built-in. Hi-tech look, lightweight charger with built-in three pin AC plug. Includes four AA 2300mAh rechargeable batteries. Four LED charge indicators for each battery indicate charging status and faulty batteries. It will charge each battery individually and stop charging each battery individually once it has been fully charged. The charging current for each battery bay will shut off once charging has completed for each cell and the fuel gauge display will indicate the charging status across all battery bays. all cells will receive a very low charge current (trickle charge) to 'top off' each of the batteries until the 80 minute timer has exhausted to ensure they are fully charged and ready for use.