Our resort only allows electric motors so I have researched and used a lot of batteries for trolling motors. I switched to AGM types many years ago. Yes, they about 2+ times the cost of the Walmart lead battery but mine have lasted for at least four years. The size 31 are what I have since they are permanently mounted in the boat. I always have a charger on them even through winter. Battery Plus stores have some nice ones as well as Cabelas. Hope this is helpful.

I Subscribe to Pond Boss Magazine

To Fish or Not to Fish?
What a stupid question!