Someone in comments pointed out this link to me and it was worth sharing:
http://www.battery1234.com/

Its a page with two episodes of The Survival Podcast on the subject of emergency backup battery systems. I listened to both episodes and was quite pleased. Lots of information and lots of very specific information…names are named. Yeah, everything the guy discusses is linked to on page and available off Amazon, but I thought the content of the two articles was so good that who was I to begrudge the man a chance to make a few bucks off his links?

I listen to TSP on and off…Far too much permaculture and gardening content for me. Not saying its not important, just saying that it gets boring after a while. Anyway, the two episodes at the link were, in my opinion, quite good and I recommend them to anyone who is still behind on getting some sort of backup/emergency power system in place.