Thanks again, knc1.
Left my Kindle 3 WiFi connected to the charger. Not much change.
I removed the battery and set it aside for about 5 hrs. Put the battery back in connected the charger and it rebooted. Disconnected the charger. Played around with Print Battery - At a level or 100% battery, Voltage was approx 4186 mV and there approx 1535 mA charge. Temperature was around 84 F. Drain varied 40mA to 120mA. Read the Kindle manual for a while. Battery Voltage, charge and percent dropped slightly (to about 98%). Left the Kindle alone. When I came back - white screen,
I'll try your battery pack suggestion and let you know how it goes.