FWIW: w.r.t. my post of Aug 31st, I ordered another stock OEM battery for my Spectrum. Interestingly, it's easily lasting me through the entire day... and I suspect it will last much much longer.
Two takeaways for me:
1). I don't think all OEM batteries are created equal. There is probably a distribution with a pretty large standard deviation, and this one is on the right side of the mean... out there.
2). One must not under-appreciate the improvement to be gained by performing a FDR on your device and running stuff that is essential. Possibly I'm benefiting from the fact that since I didn't perform an FDR after upgrading the stock OS, perhaps some setting was sub-optimal. Also I had really messed around with the governor settings via some root tools, and I'm just not doing the same now.
I'm not going to recommend people perform an FDR, but if you are getting really lousy battery run-time on the stock OS, you might want to give it a try.
The other up-side, is by simplifying the device, you might find you actually like it again because it's so responsive and uncluttered. :smokingsomb: