I've had one of those for several months. Works as advertized. When showing my co-workers, they said, "Why do I need one? I have a plug-in charger." Katrina validates the usefulness of a battery operated charger.

I usually use nimh rechargable batteries in mine.

Using another adapter I discovered it will give my Garmin IQue 3600, a handheld GPS/PDA combo, a half charge.