... 4.protections 5.CE,ROHS The 12v1a 4a automatic battery charger based on microprocessor for all types ... light14Output Protect—Over Current Protection,Over Voltage Protection, Short-Circuit Protection, Reverse polarity protection , Free Spark15Efficiency %>80% ... battery without damage.6.Polarity Reverse Protection, Short Circuit Protection, Over Temperature Protection,Over Current Protection, Over ...