You can use the Cisco Wireless IP Phone 8821 and 8821-EX Desktop Charger to charge your phone and spare phone battery. The charger works on AC power or from a charged spare phone battery. It can be secured with a standard laptop cable lock.
If your phone has a protective case, you don’t need to remove the case before you charge the phone in the desktop charger. You adapt the charger to fit the phone.
You can use a USB to Ethernet adapter (dongle) to connect the desktop charger to the Ethernet for only automatic Wi-Fi profile provisioning and certificate enrollment purposes. You cannot use the dongle to make voice calls over the Ethernet. For more information on the USB port, see the Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide.
