My girlfriend and I just got our 2 510 PCCs from cignot. Everything was very smooth. However, there is a small difference between the PCCs. Mine has a little ball button to open the case and hers has a squared off circular button. Also, they do react a little different when charging. Hers tends to charge and the light goes on when my doesnt. This only happens when the battery is like 95% full. Thoughts?