I am on vacation, and tried to charge my kindle with a 4-outlet USB AC adapter. The other items plugged into the outlet are charging fine, and the Kindle will charge when plugged into my computer. I've switched locations on the outlet, which didn't help. Every time I try to charge via the wall charger I get a blinking/flashing yellow light (rather than a steady light). Any ideas? I googled the problem, and read the user guide, but came up empty handed. Thanks in advace- y'all are such a helpful group!