I had a battery back up for my Englander 25PDV, but when I tested it out it didn't work worth a darn, crapped out right away lights started flashing and it started beeping at me so I had to unplug it. I just use it now for a surge protector while I figure out what I'm going to get. The internal battery is good it just wasn't capable of keeping the stove running. Now I'm on the lookout for something bigger or maybe one of those sump pump back ups. What do you have and how long will it run the stove for if your power goes out?