I found that the connection is incomplete. This might be because it's dirty connection. In my case I noticed my cord was pretty narrow and wondered around in the port. I took a tool and squeezed the wide side to widen the opening of the center. So it would have a better connection with the negitive connection to the outter metal from the cord to the port. I found the charge time remained steady even when wiggling the cord a bit. Granted the time changes after a few seconds after plugging it in but after that is what I'm talking about.
... View more