So I got my 510 today and Im a little confused as to charging the batteries? The instructions say to charge 8 hrs before use, use 20 min and then charge an additional hour. Ok so I have one in the wall charger and the other in the PCC plugged into the computer. But does the PCC need to charge by itself before it can charge the battery? I left it plugged in til the light turned green (maybe 10 min) then put the battery in and the upper light was red. But I had to move it over to a dif. computer and now bottom light is red again? Im sure Im making this more complicated than it actually is... typical right? Sorry, just want to make sure Im doing this correctly...