I keep mine unplugged and it gets surprising good battery life, and I think it kinda improved with the downgrade. On normal use I would get like 8-10 hrs screen on time. No spicy pillow yet, though I did have that issue with my old iPod.

Do you know long it can last unplugged answering requests with insomnia?

My old iPad lasts weeks on its battery if I don't use it, I can only imagine it actually sleeps and would not answer network requests in this state.

No idea honestly, but the main reason the battery lasts so long is that it turns the WiFi off, which is why I had to install Insomnia. It was doing fine so far, with 60% battery, but decided to plug it in since it's getting many requests now

OK, thanks!

Congrats for the successes :-)