My battery someone got discharged 10 13 volts and now wont charge....anyway to revive?

Have a read of the battery manual, it may be in hibernation:-

I would just stick on charge and leave for a couple of hours see if it comes to life again.

Battery manual "Phantom 3 Intelligent Flight Battery Safety Guidelines v1.0
2015-12-01"

Can be downloaded HERE

See page 3 under battery storage.

Hello jeff, you could follow aardvark's advice to leave your battery for charging 1 or 2 hrs to see whether it works well again. If the battery still has no response at all, please contact our NA service center as below:
Email: support.us@dji.com
Phone: +1 (818) 235 0789  
Mon-Fri 9:00 am - 5:00 pm (PST)