The G-3500 Smart Charger by Noco is a 3.5 Amp battery charger designed to charge and maintain medium batteries. This is a perfect charger for cars, SUVs, boats and trucks. Noco uses true Switch mode technology in this super efficient line of chargers. This charger has a noise factor of 150mV, less than 50db. This charger is a true multistage, microprocessor controlled charger that will not overcharge your batteries ever. Also incorporated in this unit is the ability to adjust to low voltage input, which could happen if running it off of a generator or a very long extension chord. read more...