ToolkitRC M4AC is a miniature charger for 1-4S LiPo batteries. The charger is powered from the mains and therefore does not need any external source. Power of 30W is sufficient for batteries used on 5 "helicopters at the recommended charging current of 1C or for charging batteries on smaller helicopters. Unlike similar chargers that charge batteries via a balance connector, the M4AC has the option of charging settings while keeping low price. For the charger, you can select the voltage at which the battery is to be charged and the current at which the battery is to be charged.