Automatic battery charger for automotive 4-100Ah 12V1、This is a fully automatic charger with 3 charging stages, constant current charging, constant voltage charging, trickle charging; it can prevent the battery from overcharging, so you can connect the charger to the battery indefinitely. 2、Multiple protections make it safer. Overvoltage protection, overheat protection, overload protection, short circuit protection, reverse connection protection, overcurrent protection, low current protection. 3、Equipped with a silent cooling fan and aluminum radiator, which can extend the life of the charger. And in summer and winter modes, it can detect the temperature and automatically switch to the appropriate voltage. 4、Microprocessor (CPU) control can save battery and provide battery charging service quickly! With a pure copper transformer, it has the advantages of stable output, high energy conversion rate, energy saving, and large capacity. 5、The digital LCD display shows voltage, current, temperature, and battery power in real time, making it easy to read. It supports one‑key reset and activation, which is very convenient. 6、The exterior is made of ABS flame‑retardant material, insulated, flame‑retardant and high temperature resistant. Freeze‑proof soft copper wire, with a fully covered alligator clip, dirt‑resistant and practical clip. 7、Suitable for most lead‑acid battery types, including calcium, GEL and AGM, wet type, EFB, etc. Our battery charger can also help recover depleted and sulfated batteries.