Review on 🔋 NOCO GENIUS2X4 Smart Charger: 4-Bank, 8-Amp (2-Amp Per Bank), Fully-Automatic Battery Charger & Maintainer for 6V and 12V Batteries. Includes Trickle Charging, Desulfator, and Temperature Compensation by Marcus Block

This is amazing. Even the packaging is impressive. Comes with everything you need. Just connect it to your batteries, turn it on and go. It has a brain that watches over your batteries to make sure they're getting exactly what they need to stay healthy and ready for you when you need them. You can leave them on indefinitely (you still need to check the water level in flooded lead-acid batteries regularly, of course *only use distilled water for topping up). I bought this for our RV batteries and my mower batteries. I love that if we upgrade our RV batteries to lithium-ion, we can keep our RV batteries going through the winter with this charger. And as a bonus, it looks great on my garage wall.