I went to battery service and supply and picked up a refurbished gel battery to replace my trolling motor battery. Only paid $50 for it without a core, The thanking was if it last six mouths I would still be good. I have had it now for over two years and it has never let me down. I do a lot of trolling six to eight hours a day and it is still as strong at the end as it was at the beginning. Just luck maybe, but when I need a new battery again you know where I am going.