Do not recharge the batteries discharged too.

I am disappointed, I bought this charger to charge the battery of my bike which was fully discharged (it is new, the bike has one year but my alarm all pumped). Except that the "smart" charger detects the battery type respectively if the voltage is 3V to 6V battery and 7.5V to 12V battery.

So, if your 12v battery is too discharged and it delivers only 3 or 4 v charger does not charge because it detects that it is not a 6V battery, but it can not check if it ' is a 12v battery.

And if you have a battery of 6v but discharged under 3V idem, suddenly I pay 25 euros for an object that gives me the voltage at the terminal of my battery but do nothing else in my case. So I have to buy a charger "not smart" but any type of battery charging whatever the level of discharge.