Had to log out to reply. Samsung fix your beta forum!
Anyway, my battery life improved greatly after rebooting into recovery and wiping cashe.
It's still not as good as before any beta firmware but better then losing 40% overnight while a sleep.
Recovery: power off watch. Power on watch while holding both side buttons at the the same time. When you see "Samsung" with "rebooting...." under it, quickly tap the upper button (power button) 3x. Once menu appears, navigate with power button to "Recovery" (highlighted in blue) then press and hold power button. Now in recovery, navigate with bottom button to "Wipe cashe partition". Press power button. Navigate to "Yes" and press power button.
I personally wipe cashe 3x (OCD LOL) before rebooting.
Right after installing an update I allow the device to boot up BEFORE wiping cashe. Wait until the notification message "update complete" or "finished." Then wipe cashe. Do that on any device after a firmware update.
Hope that helps.
Thank you for your response. Yes I tried your fix and it seems to have helped a lot. I also received a update the next day. Battery life seems to greatly improved since doing both steps. Thanks again.