[hofnodinstructor]

I have been using Lithium Iron Phosphate (LiFePO4) Batteries to power my electric reels for the past 4 years. I have found the 15 amp model made by bioennopower.com to be the most reliable. Expect to pay about $170 which includes the required charger. This battery runs my Daiwa 500 series all day and my smaller Shimano 1000 for a few days between charges. Be aware that a lot of manufacturers use lead acid equivalent ratings which are lower in capacity. Bioenno ratings are accurate. I have also been experimenting with LIPO cells from China from Banggood.com. They sell 14.4 volt batteries which give the reels a little more speed but I have started to notice some swelling of the packs due to summer heating. LIPO explosions are not a good thing so I keep them in the explosion proof charging bags. They also require a balancing charger to equalize the cells voltage. Hope this helps.