hi guys.. i'm using an HTC Desire C and i bring my usb cable everyday and charge my phone on my office laptop if my battery goes down to 15% or below...now, my question is, should there be a difference in charging time when charging via usb or AC? i can get a full charge via usb at around 2-3hours..about the same charging time if charged via AC. so for you, how long should i charge via usb? anyway, when i first bought my phone a month ago, i think i didn't hit the 8-hours initial charge..does it affect battery performance? my phone lasts me a day or 1.5 days with the juicedefender..