When I left home, my iPod, Kindle, computer, and GPS were all fully charged. When I got to Finalnd, my iPod and computer were still fine, but my Kindle and GPS were completely drained. I have no idea why. All of them were in the same bag, all of them were off (except the laptop, which I used in flight), and the two that were drained were completely drained, not just low. Plus they recharged just fine once I got here.