Discover on-board battery chargers. The most advanced multiple bank battery chargers for marine, deep-cycle, and boat batteries. Fully-waterproof, IP68 rated. NOCO Genius On-Board Marine Battery Chargers automatically diagnoses, recovers, charges, and maintains your batteries. These NOCO marine battery chargers can safely charge wet, gel, maintenance-free, and AGM batteries. NOCO Genius Battery Chargers are. The NOCO Genius G3500 battery charger is an earlier version of the more recently released Genius 5A battery charger. The specifications are similar to other 6V/12V battery chargers in the same category, with the main drawcard being the reported ability to repair flat batteries and maintain the charge of lithium-ion batteries. NOCO Genius Battery Chargers 12/24 Volt 10 amp per bank waterproof marine chargers. The NOCO Genius marine charger is a fully automatic and fully interactive Micro-Control-Unit (MCU) charger, making it faster, more powerful, more reliable, and smarter than most competitive brands, and has one to 6 totally independent outputs.


Go beyond smart charging.


Our most advanced battery charger yet. Its a charger, maintainer, and desulfator. And it's incredibly powerful and compact.


Completely waterproof on-board smart battery chargers designed for harsh, marine conditions.


Precision designed industrial battery chargers for golf carts, scissor lifts, utility and electric vehicles.


Noco Genius Battery Charger

The toughest battery boxes ever.

Snap-Top Battery Boxes

Rugged injection-molded battery boxes for marine and deep cycle batteries, including group 24, 27, 31, U1 and more.

Commercial Battery Boxes

Rugged rotationally-molded battery boxes for marine and deep cycle batteries, including group 4D, 8D, Dual 6V and more.

Battery Trays

Rugged injection-molded battery trays for marine and deep cycle batteries, including Group 24, Group 27, and Group 31.


The power of lithium.

Jump Starters

Portable lithium battery jump starter packs up to 3,000 amps. Powerful battery booster jump box for jump starting cars, boats, motorcycles and more.


Noco Genius 10 Amp Battery Charger Manual

Powerful cleaning and prevention.

Corrosion Preventative

A premium oil-based preventative that’s guaranteed to stop battery corrosion for the life of your battery. Its viscous compound never dries or evaporates providing an anti-corrosion guard from corrosion causing battery acid.

Battery Cleaner

A professional-grade battery cleaner that instantly neutralizes and removes battery corrosion, making cleaning battery terminals quick and easy. Software sequence diagram example.

Glass Cleaner

Tackle the most stubborn dirt and grime with our professional-grade glass cleaner. Non-abrasive and foaming, it's streak-free formula is useful for automotive, bathroom, and household applications.

Noco Genius Charger Problem



Designed tough. Long-lasting, dependable accessories.

Boost Accessories

Connect Boost safely with our heavy duty and precision clamps, interchangeable with the GB20, GB30, and GB40. Also, maximize your options by mounting the Eyelet Cable Adapters to the battery for quick access to both charging and jump starting— plug-n-play with Genius Chargers or SAE equipped battery chargers. Lastly, increase the reach of the 12V charging input and output functions on the GB70 and GB150 with the XGC extension cables.


Add more ways to charge with X-Connect accessories. Designed tough to survive harsh conditions.

12V Accessories

Expand the versatility of your 12-volt devices, like tire pumps, power inverters, portable fans and more. Designed for any cigarette lighter socket, direct connection to your battery, or other 12V power source.

GCP AC Ports

GCP AC Ports offer flexibility and easy installation to power engine block heaters, battery chargers, and much more. Quickly plug-n-play with any extension cord and zero cable modifications or hard wiring.

GX Accessories

Connect and customize the way you charge with your GX Industrial Charger. Choose between the Anderson SB50 Connector and Heavy Duty Eyelets. Then tailor, fit, and seal the GX connector to fit your battery application. Use GX Accessories with golf carts, scissor lifts, aerial lifts, boom lifts, sweepers, scrubbers, pallet jacks, stand-up forklifts, aisle forklifts, NEVs, UTVs, material handling carts, and more.

The NOCO Genius is a smart, 8 step fully automatic switch-mode battery charger, All NOCO Genius chargers use a smart charging process that allows them to charge batteries faster and restore batteries to their original capacity. Once you choose NOCO Genius battery chargers, it is a matter of you deciding what options are important to you. Do you need a single output for one battery? Do you need to charge more than one battery system? Do you need the ability to charge bigger batteries or only maintain the small stuff? Take a look around at the products below and shop away.

NOCO Genius 1 6v 12v 1 Amp Battery Charger & Maintainer
NOCO Genius 2 6v 12v 2 Amp Battery Charger and Maintainer
NOCO GENIUS 2D 12v 2 Amp Direct-Mount Battery Charger and Maintainer
NOCO Genius 5 6v 12v 5 Amp Battery Charger and Maintainer
NOCO Genius 10 6v 12v 10 Amp Battery Charger and Maintainer
Noco genius battery charger gen 1
Noco Genius G4 4 bank 1.1 Amps per bank, 6 and 12 Volt Battery Charger
NOCO Genius 12v 5 Amp Marine On-Board Battery Charger & Maintainer
NOCO Genius 12v 24v 10 Amp 2-Bank Marine On-Board Battery Charger
NOCO Genius 12v 24v 36v 15 Amp 3-Bank Marine On-Board Battery Charger
NOCO Genius 12v 10 Amp Marine On-Board Battery Charger
NOCO Genius 12v 24v 36v 30 Amp On-Board 3 Bank Marine Charger
NOCO Genius 12v 24v 36v 48v 40 Amp 4-Bank Marine On-Board Charger
NOCO 24v 40 Amp UltraSafe Industrial On-Board Battery Charger
NOCO 36v 26 Amp UltraSafe Industrial On-Board Battery Charger
NOCO 48v 20 Amp UltraSafe Industrial On-Board Battery Charger

Wicked Smart Battery Charging Technology!

Every one of the NOCO Genius battery chargers works with a fully interactive MCU controlled internal brain that will fully charge each of your batteries in the most efficient manner possible.

Each set of output leads delivers an individual charge to each battery that they are connected to. This allows you charge different size batteries, regardless of each batteries beginning point. What this means is that overcharging is a thing of the past


To learn more on the importance of maintaining a battery, read our tutorials on how batteries work or start shopping by viewing the products on this page.

Of course, if you get stuck, you can read our battery chargers tutorial to learn more about how to select the correct charger, or you can email us or call us toll free at 1-800-362-5397.

Every one of the NOCO Genius chargers by NOCO meet or exceed ISO 8846 Marine Standards and US Coast Guard 33 CFR 183.410 and FCC15 part A and B compliant