Four independently functioning charging circuits to reliably charge your single-cell LiPo batteries AC/DC 6V power supply compatible All 4 ports can be used simultaneously or one at a time No need to use batteries while at home near a power source Use the optional E-flite 6V power supply (EFLC1005) High capacity D-size batteries provide many charges and mazimum portability Charges E-flite and ParkZone single-cell LiPo batteries