Im a noob to android. I just got my epic a few days ago, and today I read that there are some issues with charge speeds, particularly charging from the car's power or usb outlet, when using some usb cables, adapters, chargers, etc. How do I tell if im charging at the default .75 amps or the slower usb .5amps, or if an adapter is labeled as a 1 amp adapter is actually charging the phone with 1 amp?