Yeah, I guess the tin foil was a pretty stupid idea lol. Mostly when I noticed the battery rattling around in there, I really wanted to find out if that was the only reason it wouldn't turn on. I didn't want to open it up because it is still under warranty, but now they're sending me a new one, so I guess I might as well give it a shot. There are a lot of screws on the outside - hopefully that means it's pretty easy to take apart. And I'll have an excuse to use my miniature screwdriver and star bits lol.
I ended up switching back to my beat up old eleaf TC 100W, which has somehow survived for at least 3 years of regularly being dropped, and I thought it didn't work that well anymore, but I put in the 30A Samsung batteries that I bought for the Aegis, and it seems like I'm actually getting more power than I was out of the aegis. I'm using a freemax tank with a .12 ohm SS atomizer, and I had the aegis set on around 515 F and it was struggling to get it to that temperature. On the eleaf, the TC seems to be totally inaccurate, but when I set it at 310 it's hitting pretty good, and it will easily go much higher and give burnt hits.