I have achieved testing the MintyPi with my tweaks originally posted here viewtopic.php?f=43&t=4258#p46032
I managed to activate everything except the switching off of the HDMI because fbcp is using the output from the HDMI to copy images to fb1 from fb0, so deactivation of the hardware interface simply kills the display, and you have a good old black screen

That said, i've been a bit further than my older post and also deactivated the NTP to save a bit more...
I've unfortunately lost the small piece of paper where i have written the battery lasting results in a "stock" image (as provided by Wermy/Helder/HoolyHoo) so i have no more accurate comparison

From what i remember, it was around 2 hours and half.
I've done so far one complete shot of gaming and had a decent 2 hours 52 minutes play time.
Would you please leave here a feedback and tell me what play time you have (please be as accurate as possible) with the stock image ?
You start from a completely charged battery and you stop the stopwatch when HoolyHoo's script automatically switches off the device after the 1 minute countdown !
For now, i had no troubles running things like i have tweaked them.
I still had 2 freezes but i had them before too, as many people here. Now that i understand the way things are going around in the MintyPi, i suspect either fbcp, either fbtft from crashing so the image is not refreshed anymore but the game is still ongoing (as the sound is still playing normally until you die

I can conclude from that, that the system is still up and working (game playing, sound outputting, and you can clearly feel or hear the time you die in the game lol).
Ok, so please posts your results here so we can compare.
Next step is to create a script to activate them on demand or all in one shot so we can use that script either in a "a la Wermy" style build, either in a MintyPi, either in a "a la Kite" build

Thank you for your help