Does anyone else's device charge extremely slowly via USB? If I put my phone on a QI charger, it charges fine. But, if I connect it to the charger that came in the box, it charges *extremely* slow. If I use the phone while it's connected to a usb charger, it actually loses battery. I contacted Google, and they think it's a faulty charger but said they'd have to replace the entire device. Which I really don't want to do.