Welcome aboard.. first thing is plug it I with the factory charger and cable...
When it will turn on, install an app like gsam battery monitor.. it has a feature called app sucker.. it will show you which app is sucking down the juice...
If that doesn't help.. you may consider clearing the cache on the phone.. and possibly a factory data reset..
If it continues, you may have a dead cell and need to call vzw for a replacement...