I charged battery to 100% last night, unplugged charger and when I woke up, phone was dead: battery at 0%. What would cause phone battery to drain so fast when not in use? I've never had a cell phone drop 100% charge in under 8 hours before!
Do you reboot your phone everyday? This allows your phone to recycle, just like a computer. Sometimes doing a hard reboot helps too, if that doesn't work I'd go to a Verizon store and have them take a look at it. That phone might have a bad battery.