Jfind 12V Pulse Repair Lead-acid lithium Car Battery Charger LCD Display battery tester Fast Charge For Car/Motorcycle JFIND 12V Car Charger With 6 Protection Functions 1.Overcharge protection 2.Low voltage protection 3.Overvoltage protection 4.Reverse polarity protection 5.Short circuit protection 6.Temperature protection JFIND 12V Car Charger for 4-100AH Lead-acid Battery 1.constant current mode 2.constant voltage mode 3.floating charge mode 4.Battery Repair 5.Smart chip (fully charged automatic stop) 6.Automatic fan cooling JFIND 12V Car Charger with Automatic Cooling Function When the device is turned on, the fan will automatically start to cool the device JFIND 12V Car Charger Can Repair/protect Battery Repair and protect batteries with high and low frequency pulse technologyClick the Repair button for 5 seconds to enter the automatic repair mode. During the repair, the device can still charge the battery. After the repair is completed, the repair mode will automatically close.Tips: Can t repair short circuit, open circuit and damaged batteryJFIND 12V Car Charger is easy to use