This Car Battery Charger have 10-second car engine start function and temperature control fan, when MCU detect the charger?s temperature more than degrees will open the fan until below to? degrees.Can choose charging current, Also have auto stop when full recharge function.?constant current,constant voltage,floating(trickle)quick charge.-second car engine start function.High efficient power transfer technology.Compact and lightweight design.All kinds of working state digital display.Intelligent digital battery repair and active function.Various power circuit protection.Alumium magnesium shell,plane drawbench and metal anodic oxidation tecnology.Temperature control fan.LED display.You can use the charger’s engine starting function to start up when coming across following problems:The car has no eletricity and breaks down.The engine oil becomes thicker in winter,which makes it difficult to start up.The car’s engine is aging and it is unable to start up the car