Yes, I fully charged it prior to first use. And it gets to 100% charge on the provided wall charger. Maybe I'll try a hard reset to see if that makes any difference. I have a full backup on SPB, so no worries on losing anything.
If that doesn't work, I guess it's back to BestBuy for another battery or replacement phone. The battery life on this one is really, really poor. Ironically, that's why I replaced the 6700. The battery would not hold a charge anymore, and I wasn't sure if it was the battery or the phone after 2 years, so used it as excuse to upgrade.