HUP solar batteries last 2100 cycles of up to 80% discharge, while golf cart batteries and L16's only last for 500 cycles. Why? forget all the mumbo jumbo about various battery technologies, they're all the same essential chemical reaction that has been around for over a century. HUPs last longer because the plates inside are 5/16" thick. Each time a battery is cycled it errodes some of the plate away, so the thicker the plate, the more times you can cycle the battery. It's that simple! Compare HUP batteries to Trojan, Golf Cart, Marine, RV, and L16 batteries.