There are very few companies that actually make the batteries themselves, and they make everyone else's batteries, so it really depends on where you can get good service, and price, and the best warranty you can. Maintaining the batteries is the key to getting good service and battery life. I use WM batteries, and usually have to replace the TM battery after about 3 yrs, but I figure it's a cost of enjoying the sport, just like ammo/guns for hunting, or gas for the motorcycle, etc., Cranking batteries can/do last longer but if you run several FF's, you should get as large a battery as will fit in the space.