Review on NOCO GENIUS10 Smart Charger - 10-Amp Fully-Automatic 6V and 12V Battery Charger with Temperature Compensation for Maintaining, Trickle Charging, and Desulfating Batteries by Rubeen Black

I have a gel battery, a new one costs 178.00. He's been dead for 3 years. I couldn't face the thought of throwing it away. I've used this battery for everything when I've traveled and met someone who needs a charge. Just bring the battery to your car and it will work great. Need some relief for your camp. Just connect the battery. etc. Well I left it plugged in and it went out of power a couple of times and almost died. Fast forward 3 years, it took 3 days and 3 "repair" cycles. The battery is back. I have a truck that regularly drains and sulfates its batteries. .3 times repair and the last battery is alive again. It really works. Yes, and it also charges dead batteries. :)