[Q] Any custom ROM for battery hogging Galaxy Tab 3 8.0? topic

I have the Galaxy Tab 3 8.0 (WiFi) running KitKat 4.4.2 and every time I want to use it, the battery is low even though I left it at 100%. I've been trying to improve it for quite a while now. I rooted it and removed everything I could find on the lists that's safe to remove, turned off everything I don't really need, and I have Better Battery Stats and Wakelock Detector on it as well as No Bloatware and Titanium Backup. Also removed many apps that I had installed myself that seemed to be using the battery a lot. I turn off sync and WiFi when I'm not using the tablet. My efforts have improved it but it's still not good. I've done all I know to do, and I'm at the point where I'd install a custom ROM if I could find one for it. I've done some searching and haven't found any. Can anyone tell me if there is a custom ROM that will work for this tablet? Or perhaps I can "downgrade" it back to Jellybean (which it originally came with) if I can find out where to get that ROM for it someplace (I'd prefer a custom ROM though). Any ideas?
Thanks much.