That Cabelas X-900 battery is a rebadged Northstar 31 AGM, one of the best batteries around, especially for cranking. It is a real beast. However, if you go AGM for the troller, the Duracell 31 AGMs at Sams , which are rebadged Dekas, are just fine for half of the price. No need to spend nearly a thousand dollars for three troller batteries. Make sure your charger is capable of charging an AGM.