I had a lithiuimPro 36v single battery and it was great. their warranty is long enough that I didn't worry about repairs. One thing it did do was my batteries were in the front and it changed how the boat rode so I had to add some weight to the front. The only reason I still don't have it is I upgraded the boat. One thing I wasn't a fan of was the thru charger that connected thru a 12v battery. I prefer to just have a charger that was dedicated to the 36v.