GENIUS2X2: 4A 2-Bank Smart Battery Charger (2A/Bank) - 6V/12V Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium

The NOCO GENIUS2X2 has been an excellent addition to my garage. Being able to charge and maintain two batteries at the same time is a huge convenience, especially if you have multiple vehicles or seasonal equipment. Each bank operates independently, so you can connect different batteries without worrying about interference. Setup was straightforward, and the included cables and clamps feel high quality. The smart charging features are where this unit really stands out. The temperature compensation works exactly as advertised, adjusting automatically based on ambient conditions, which gives confidence when leaving it connected long-term. I’ve used it in both cold and warmer conditions with consistent results. One of the most impressive features is its ability to recover deeply discharged batteries. I successfully brought back a battery that I assumed was beyond saving, and the desulfation function seems to have genuinely improved performance afterward. It’s reassuring to know the charger actively monitors the battery and prevents overcharging, making it safe for indefinite maintenance. Overall, this is a well-designed, professional-grade charger that delivers on its claims. If you need a dependable two-bank charger for cars, motorcycles, lawn equipment, or marine batteries, the GENIUS2X2 is absolutely worth the price.

Wow! Great Parts and easy connections. Plugged in and it worked without fooling with it.

Works great for my 24' 3500 silverado duramax. The dual battery chargers are connected to each of the batteries and and I opted for the optional 110v plug that I mounted in the plastic shroud near the front bumper. I just plug the truck into and come back to fully charged batteries. Im hoping that by maintaining the truck batteries this way they'll last longer. Batteries are spendy, diesel truck batteries are 2x the cost, if i get a year or two extra life out of them becuase of this ill be stoked.

Great product. I rarely give out 5 stars. I have 3 cars and dont drive often so keep two of the cars on the smart charger. This is an advanced trickle charger with the ability to recover a dead battery by delivering strong pulses of energy. The charger has good heat level. Small in size but very powerful. Easy to use. comes with cables , clamps. I also purchased cables to attach to my batteries so I dont have to pop the hood, just a quick disconnect.

This is an excellent maintenance charger for multiple types large batteries. If you have an agm type car battery this is ideal. I have many small maintenance chargers but they are all made for the older standard lead/acid batteries. There is a difference! I have two of these now. Excellent quality. A must have in Michigan winter. Extends battery life.

I love noco products I have jump start,battery chargers,noco battery’s LP30 LP 20..only thing was missing in this unit is motorbike Conection,this unit comes with 2 clamps.over all very well made,easy to use

Right out of the box, the instructions are easy and set up gets done fast. If you’re not sure which battery setting to use AGM, Lithium or 12 volt), no worries, this Bank determines it for you. We charge two batteries in our snowmobile trailer at once, and TGE second one charges two automobile batteries at once in our garage. This is easy and works very well.

I bought this smart charger to keep my boat batteries charged over the winter season. The NOCO Genius 2x2 is a great battery charger/tender. I love how it comes with long extension cables to make sure I can charge both batteries at once. The large display is easy to read from off our boat. The dual charger is great because I only have to run one extension cord onto from our plug to the battery compartment.