I had the same issue, but not at first. Mine was the charger. The negative post on the charger, the one that applies pressure to the battery to push it into the positive post, would eventually sink back farther towards the bottom of the charger. This would keep the positive post from making good contact with the battery. Once I raised that negative piece back up, everything started working again. I still have to raise it every 5-6 charges, but it only takes a second to do and it's not that big of a deal to do it.
Ivisi
Ivisi