Shop at The Home Depot. Charge and Maintain Four Batteries at Once. The NOCO G4 battery charger and maintainer are ideal for anyone needing to charge and maintain multiple batteries at one time. Each battery bank is completely electrically isolated, allowing different battery chemistries and battery voltages to be charged with each bank. The G4 comes with an integrated AC cord management system and detachable charging cords to provide a clean and mountable installation. The G4 AC cord can be routed out of any side of the charger, and excess cable can be stored in the enclosure's coil system. The detachable charging cords allow you to remove the output cables from unused banks and easily re-add them when needed. Keep your vehicle batteries charged and maintained with ease using the NOCO G4. This fully automatic charger is designed to be used with small batteries, from 2.2 Ah to 40 Ah, such as those found in motorcycles, ATVs, jet skis, and snowmobiles. It can also effectively maintain 6-Volt or 12-Volt batteries in larger vehicles like cars, trucks, boats, and RVs. Thanks to four independent battery banks; you can simultaneously charge multiple batteries of different sizes, voltages, and chemistries. The G4 uses a thorough seven-step process to charge and maintain your battery and features a switch-mode design, resulting in a charger that's small and lightweight.