There isn't much information on the detail page, so it's very easy to make the mistake I made and think that it's an AC adapter for the Zaurus. It's not. You have to take the battery -out- of the Zaurus to charge it with this charger. That forces the Zaurus onto backup-battery power, which doesn't last long. So this charger is completely useless unless you want to buy a second battery, which is another fifty bucks.