The fully automatic trickle battery charger needs no manual operation. <br> The batteries can be charged and maintain for long hours by just plugging in the device. <br> It has energy saving design with one LED indicator to display different charging status and extend the battery life and recover batteries more effectively. <br> Suuwer’s battery charger can charge all types of 6V/12V 4ah 5ah 6ah 7ah 7.2ah 8ah 9ah 12ah 12.7ah 13ah 14ah 18ah 19ah 20ah 24ah 28ah 30ah 33ah 35ah 40ah 45ah 48ah 50ah 55ah 65ah sealed lead acid battery, including flooded or sealed maintenance free batteries (SLA, ATV, AGM, gel cell). <br> The charger offers safety features including reverse-polarity protection, over-current protection, overload protection, over-voltage protection and over-charge protection. <br> It serves as the best smart charger for automotive, motorcycle, marine, RV power-sport, lawn & garden mower and children toys.