That's charger smaller is better and faster than the other slightly clunky devices. Another advantage is the operating variant "trickle charge" that is simply the charger to the battery in the winter when ailing "Removing NOT to'd have to end" battery (useful when making normal charge) Connect and charge overnight (conservation). Fully automatic! No overload, no defects on the battery or the electronics of the car! Fits with, connect to the engine compartment, to trick, to cover, car and go to sleep :)
