Was about to purchase a 6V UPS battery, but had second thoughts when I saw how small it was. I did a quick search on the net and found this thread, where Don mentions in post #24 that it requires an automotive size battery. So, I found that the same store actually had an automotive size battery contrary to what they had originally told me. Their site said they should have one in stock, but of course they couldn't find it. Luckily, another one of their stores had one not too far away. I'm not sure yet what the battery is supposed to power, but I'm sure it should be more than enough with 640 CCA and 130 minute reserve capacity.
https://www.fordbarn.com/forum/showt...9786&showall=1