1.Multi-protectionBuilt-in circuit protection prevents reverse polarity, sparking, overcharging, overcurrent, disconnection, short circuit and overheating.2.Wide range of applicationsThe three-stage chargers are suitable for most battery types, including calcium, gel and AGM, wet batteries.3.They may also be useful for restoring depleted and sulphated batteries. For cars, trucks, motorbikes, lawnmowers, boats, RVs, SUVs, ATVs and more.4.12V 6Amp This charger is designed for 12V batteries, wide voltage support 110-220V input current, automatic adjustment of charging current, easy to deal with a variety of harsh voltage environment.5.Battery MaintenanceCar battery charger, also a battery maintenance device, pulse repair function can help to repair your lost battery and extend battery life. Note: It cannot activate dead batteries or repair severely damaged batteries; it also cannot repair batteries back to 100% new.