One of my WORST fishing memories with my father was when he said he could no longer carry his battery down to the boat. I think all little boys start out thinking their father is invincible. It was a little chilling to see that Father Time was starting to nip at the heels of my father since he couldn't lug an 80# battery any more!

My old deep cycles are still functional so I haven't yet looked at the lithium batteries. If we do get an expert to chime in, can I add a question to TJ's? What is the type of duty cycle that the lithium batteries are designed for? (Or are there already different designs for different applications?)