I bought this charger (the smallest in the range) with full knowledge. I have 2 sleeping cars in the garage. I have a charger starter for these 2 vehicles (gasoline with 45 Ah battery and a diesel with 72 Ah) .. But I missed this little charger to perform maintenance expenses. With a current of 0.8 A is ideal for this type of maintenance charge. If you want a real charger ... buy the top model that delivers near 5A. The model I bought him is for the battery charge below 32 Ah..Donc cars are excluded. This is the value that triggered me this desire to purchase .... And I do not regret the course after a trickle charge for my 2 batteries, they are almost as good as new .. .Chargées block in any case to face the first cold of winter!