I'm confused, are you still using your Jiayu S3 plus as of now? You've mentioned in previous comment that or it is what you've experience before? By the way, just recently, after reflashing back to stock rom, I figured out the culprit of the battery drain. I guess it was the google play services which anonymously eating lots of battery.
Yes and no. Your right, the Jiayu S3plus is no longer my main phone (I replaced it with a Le2), but it is stiĺl working and I keep it as a backup.
No, the battery drain has nothing to do with Gapps. I like my phones Google free and use microG instead. If I remember right, I could easily patch and flash MadOS 8 with the help of NanoDroid, but it did not slow down the battery drain at all.
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