[Tybalt39]

Is the phone being charged from a PC via USB, a separate charger via USB, or the same charger as the second battery but via a separate cable/connector?

If everything is coming from the same charger "brick", what is the current rating for this "brick"? I have found that lower current capacity chargers do not work well with the TP2. I have even seen a message on my screen when a really cheap car charger couldn't provide enough current. Also, if I charge the phone via a PC's USB port, charging take a very long time, but if I use the same USB cable with a wall adapter of sufficient current capacity, the phone charges very quickly. Same phone, same cable (standard mini-USB to USB "A"). The difference is the power source.

If there are two separate power sources (as it sounds after re-reading your last post), what are they? What is the current rating?