House batteries I use Trojans, deep cycle, work great. All my vehicles, 5 now, have AAA or when they need to be changed will get AAA. The same price, they install them for free, they can be
serviced anywhere in the US if you have a problem and if they go bad they replace them for free in the first 3 years. I'm done lugging batteries around. Keep in mind there are few battery
manufactures left in the US. Price is based on quality. Different suppliers order batteries and then they are made to that request. Some may cost less because they are made with fewer plates.
This info came directly from a man who worked for Johnson for many years. Sears had quite a scandal concerning their product recently.