This 29.4V DC battery charger provides a cost effective solution to charge 24 volt 7 cell li-ion batteries 20AH or larger for mobility scooters, power chairs, and hoverboard. The charger incorporates a software controlled algorithm to enable accurate charging. With up to 4.2A charging current, The 25.9V li-ion battery charger powers up a 20AH pack in less than 5 hours without over charging the batteries. The 24 volt dc battery charger is safety certified to IEC60335-2-29. An internal charge timer provides safety backup, so never have to worry about charging the chairs overnight unattended. The 24vdc battery charger high power tech also features multi protection including bad cell detection, short circuit protection, reverse polarity protection, backfeed protection to ensure safe charging,