I switched to lithium batteries last season and have been extremely pleased. I went with TimeUSB batteries. Direct from the supplier, matched any prices I could find, very helpful during and after the sale. Walked me thru the setup over the phone. Great warranty, but be sure you have the correct charger. Mine recharges much faster than my LA batteries and lasts longer than my old group 31 twin batteries ever did. Not sure what your powering but to replace my old KA batteries the cost was 260 bucks for the pair, the new 140ah TimeUSB was the same price but last about twice as long. Old batteries were about 110 # where the new battery is 28#...big difference...highly recommended !!