Originally Posted by jgumphress
Now days manufacturers are finaly getting with the program and making thing compatible.
For the Kindle it doesn't matter and it will work with pretty much any decent USB charger.
For other devices whether it is compatible or not with a given USB adapter depends on how intelligent or picky the device is. There is a way of doing very basic identification of the charger by how 2 of the 4 pins in USB are wired up. Some devices will refuse to charge if it doesn't see that identification or if its the wrong type. These are generally things like phones and devices like the iPad or iPod.