I would have expected that an iPhone power adapter that has a USB plug as output would produce the same kind of current as another one with a USB plug, such as the Amazon Kindle adapter.
Not so, unfortunately. When I did, the battery icon on my Kindle started showing the “charge” lightning bolt, but I realized later it just kept on losing juice. Eventually it died and had trouble restarting, until I charged it with the right plug again.
It might be the difference in power (the iPhone adapter outputs 5V/1A, the Kindle 4.9V/.85A).
Kind of annoying for longer, computer-less trips (will have to bring 2 cables, and 2 adapters), although the Kindle’s battery seems to last quite long, especially if you don’t use the wireless.
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