Multiple Safety ProtectionCharger has multiple safety functions: fire resistant flower, low voltage protection, over voltage protection, over current protection, reverse connection protection, short circuit protection, overheating, ensure your safety. Intelligent charger contains a fan, it prevents overheating during charging and prolongs the life of the car charger. Intelligent LCD DisplayCharger automatically recognizes the current voltage and does not require manual operation . The display can show voltage, current, battery capacity, temperature, etc. It is possible to know the status of the state of charge of the battery. When charging, the red clip is used to secure the black positive (+) battery with the clip to secure the negative (-) battery. Automatically shuts off when charging is complete. Widely UsedSuitable for lead-acid batteries, batteries for 12V 6-150AH ,24V 6-100AH(AGM, GEL, WET, SLA, VRLA). Diagnose and repair battery problems and extend battery life. For cars, motorcycles, trucks, lawn mowers, boats, etc. Repair FunctionHigh frequency and low frequency pulse technology produces good repair and activation effects. Suitable for low voltage batteries, long unused batteries, damaged batteries and vulcanized batteries. But, it cannot activate a dead battery or repair a battery that is badly damaged, nor can it repair a faulty car charger battery recover to 100% new.