After reading tj1772's quote in another thread: things began to make sense. I have been wondering my DX was taking so long to charge, etc. At work I connect it to my laptop's USB port to keep it charged up while I listen to music, check email, use the hotspot, etc. But it doesn't charge all that fast. My laptop's USB port must not put out enough amperage. I just plugged the DX's usb cable into my old TP2's AC adapter (which puts out 1A) and my phone went from 80% to 100% is no time flat (~7 minutes). So the question is -- how many amps are needed to run the DX with various apps running. In the car on road trips, I can see myself using Navigator, playing music and using the hotspot (for the kid's iPod Touches). This last weekend I took a 2 hour road trip and only used the Navigator. I started with a fully charged battery and at the end of 2 hours I was at 60%! I was using one of those Scosche Dual USB car chargers. It is supposed to put out 1A and I only had the DX plugged into it. So is 1A not enough?