mine stopped charging from the car and I had to get a special car charger that works with both wall and car. It works but the dang phone won't hold a charge for long...getting frustrating.
I once had a battery that, all of a sudden, would not hold a charge for very long. It was an easy fix. I bought a new battery and everything was again okay. You may have a bad battery.
Are you absolutely positively sure it's the port.
Your problem could also be a bad or dying battery. Maybe you should try a new battery first.
it's the battery. this is the second time in less than a year i have sent my Charge back to get a replacement. WHy do the battery ports mess up so easily and why do the batteries not last before having to buy a new one! it;s been a week and i am still waiting for my replacement battery.