I was sent a neat video that I can't believe. It shows how you can open a 6V akaline lantern battery, and instead of finding dry cell cores hard wired together like they were when I was a kid, today the case is simply a box to hold 32 AA alkaline batteries, with contacts wired together to step up the total voltage, that's it.
So, instead of paying $4 or more for one set of 4 AA alkalines, you only have to pay $6 for a single 6V lantern battery, open it up, and dump out the 32 AAs inside and use them normally. 20 cents per battery is definately not something the battery mfgs would like the general public to know about, I expect.
FYI..............