[Cumulus]

I only have the problem when I'm charging while the radios are in a 100% duty cycle. say, wifi or phone in use, or Navizon running. I usually only charge while in the work van, so I stick it up next to the A/C vent to cool it down (that A/C gets really cold)...when it cools below whatever point, the flashing amber light blinks red one time and then it goes solid amber and charges normally...problem solved.