This Charger is designed for the various HTC mobile phones, but is actually much more versatile. It has a particularly small and compact design.
Since one end is a mains connector, and the other a USB power port, you should be able to charge most devices that can be charged from a computer's USB port.
The USB cable it comes with has the very small USB connector used by many other phones and devices, including modern BlackBerries and Kindle models.
I've used it succesfully to charge my HTC Desire Z, my work BlackBerry and two different Kindles with no adverse effects.