Chances are it was due to having close to 50k miles on my Jeep, but I have finally removed the unit from it.
I was at the park playing the radio and the battery died.
After a quick jump from a kindly friend, the Jeep fired up and I drove it home and got a new $400 battery (ugh).
Not to chance anything, before taking it in, I removed the piACC pi Zero controller from the battery to avoid
any conflict at the repair shop.
This was after almost 3 years of using it year round, it never appeared to drain the battery, I think the
battery just got old.
That being said, I saved the unit and may use it elsewhere but it appears that googles has removed
it from playstore (due to some warning email I am sure) so I will need to make it available for download somewhere else.
TTFN piAcc. :(