@iivuch here is the post with download link to abyss v1.5
@mfractal I can confirm that I haven't been using any power management apps. Overnight (6.5 hours) with wifi ON I have lost 7% battery which is a pretty good result. But you have to remember that when it comes to battery you have to be very careful when judging its drainage as it depends on the apps and services you have installed. In my case I was trying not to install anything that might require a constant internet connection. I only have facebook and gmail plus I think weather app that updates itself every hour. I bet there are some google/android services running in the background that require such connection. I still have to crack the BetterBatteryStats screenshots to find out.
As for the stock rom and battery drain I've notice that when I flashed stock KK9 over original KJ4 that phone was purchased with, the battery improved a lot. But now it is even better with RocketROM + Abyss 1.5! Thanks to eybee1970 and angelom
Btw. here are some screenshots from cpuspy and BetterBatteryStats