I think its hard not to use the Walmart batteries.....My trolling batteries just took a dump on me a couple of weeks ago and really didnt want to spend the $200 to replace them....so I was going to bite the bullet and go get new ones, well when I pulled them out of their battery boxes....they were 18 months free replacement....it had been 15 months since purchased....I use them A LOT.......I upgraded to the next better battery (24 month free replacement, longer run time) cost me $28.00 extra.....