Don't mean to hijack the thread or anything, but don't know if you've seen this. http://www.drdevs.com/devs/?dir=teamliquid%2FNightly%2FHTC+One+M8+%282014%29+Verizon. I haven't flashed myself but going to tonight.
Sent from my HTC6525LVW using...
This is the only way I would actually try a Windows Phone, so if it can be ported, I would likely try it. Though I doubt I would stick with it too long...but who knows.
Don't get me wrong, I'm getting great battery life as well (though coming from a VZW GNex, anything would be an improvement). However...posting screenshots of how long your device has been off the charger with no other information (screen on time,...
FYI, if anyone else comes across a "error: device offline" message when trying to run ADB commands on your M8, you just need to get an updated Android SDK (or at least an updated ADB).
Just try with different kernals,good kernals would give exellent battery life
...really...try a different kernel...on the Verizon HTC One M8...