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 device, it only provides power to the battery slot.

This innovative cradle also includes a styli and styli holder! Keep a cradle at home and one at the office.

Note: The spare battery charger will charge most extended batteries.