🚙[Widely Applicated]: This 6V/12V 3A car battery charger can automatically identify voltage, and adjust the charging current. It can charge Lead-Acid(AGM, Gel, SLA, Flooded, VRLA, EFB, MF, WET, ect.), Lithium, and LiFePo4 batteries, which means that it can be used for car, marine, truck, boat, motorcycle, RVs, SUVs, ATVs, lawn mower, golf carts, tricycles, agricultural vehicles, etc. ✅[Stay Charging]--Our 3 Amp Battery Charger can provide full charge to your car, SUV, or truck battery before switching to float mode to maintain proper voltage levels without overcharging or damaging the battery. It will keep your battery fully charged so that it is ready to go when you are. 🆕[All-in-One]--The smart car battery charger is multifunctional, it can be used as battery charger, battery maintainer, trickle charger(only for lead-acid battery), and pulse repair charger. No complicated steps, plug and charge. The must-have tool for your garage. 📈[Safety Charging]--AC input: 100-240V 50/60Hz, applicable battery's voltage: 6V/12V, output current: Max 3A, output power: Max 60W. Our portable battery charger has overcharge protection, over current protection, over heating protection, reverse polarity protection, short circuit protection, sparks free contact, etc. 🆗[Activate Battery & Pulse Repair]--Automatic detection, activate battery, one key to repair. If the battery has been idle for along time, old or cannot be charged, select " REPAIR " mode to try to activate the battery. Note: It can not activate a dead battery or repair a battery which is damaged seriously; it also can not repair a battery back to 100% new. The maximum repair time is 24 hours, it only can repair lead-acid batteries. ♻️[Automatic Ambient Temperature Detection]--Adopt ABS flame-retardant shell, fireproof, electric shock, corrosion resistant, solid and durable. This fully automatic car battery charger can adjust the charge current and maintainability according to the temperature. Automatic ambient temperature detection so that winter can be at full speed and summer is not overloaded. 🔋[Trickle Charging]--After the battery is fully charged, our 3A battery charger will automatically cut off power. In particular, if you charge lead-acid battery, our charger will lock in the current mode during a power outage and automatically restart into trickle charging mode or standard mode after power is restored. 🚙[Package]--One smart battery charger, ring terminals and alligator clip cable connections, and manual. 🚙Tips: If your battery is 12V, and the charger, when the charger detects that the battery voltage is lower than 7.5V, the charger will assume that the battery is 6V, which means that the battery is over-discharged and needs to be charged in forced charging mode. Force charging mode: Press and hold the button for 6 seconds. After the buzzer sounds, connect the battery and press and hold the button for another 6 seconds. Smart Car Battery Charger, 6V/12V 3 AMP Smart Battery Charger, Fully Automatic Automotive Battery Maintainer Trickle Charger for Car, Motorcycle, Boat, Lead-Acid, Lithium, LiFePo4 Batteries