I-Pad battery still showing 100%

I charged my I-Pad battery for the first time 2 weeks ago. I used the A/C charger and once I saw that it was fully charged I disconnected the A/C source.

Now, I've been using my I-Pad for nearly 2 weeks now and it's still showing a battery charge of 100%.

I did disable the WIFI and Bluetooth options and turned down the brightness settings.

I've only been using it to synch songs from my I-Tunes and I do that through the USB port on my desktop. However, the I-Pad always says "Not Charging".

Does this seem right that my I-Pad is still showing a battery charge of 100% after about 2 weeks use?

Thanks a bunch.