This Mobi Products Cradle with spare battery slot for Treo Pro let's you easily charge your Smartphone and a spare battery at the same time. Easily synchronize and charge your Treo Pro with any USB-enabled computer. Just connect the cradle to your computer's USB and you are set. The Smartphone is charged through your computer's USB port.
The cradle features a spare battery charger - great to have if you have multiple batteries. If you want to use the cradle's spare battery charger, you also need to connect the bundled AC adapter. The AC adapter does not charge your Treo Pro, it only provides power to the battery slot.
*Note: Phones with an EXTENDED battery/battery door cannot charge in the cradle. The extended battery must be removed from the phone and placed in the spare battery charger.