You can use the Cisco Wireless IP Phone 8821 Desktop Charger to charge your Cisco Wireless IP Phone 8821 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. This charger has a label on the back to show the maximum voltage (4.35 V).

You can use the Cisco Wireless IP Phone 8821-EX Desktop Charger to charge your Cisco Wireless IP Phone 8821-EX 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. The charger looks the same as the Cisco Wireless IP Phone 8821 Desktop Charger except that it shows the graphic of the Cisco Wireless IP Phone 8821-EX and doesn't have the voltage label.

Weight & dimensions
Width	185 mm
Depth	102 mm
Height	76 mm
Power
Input voltage	100 - 240 V
Input frequency	50-60 Hz
Input current	0.2 A
Maximum power	10 W
Maximum output voltage	4.35 V
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-30 - 60 °C
Operating relative humidity (H-H)	10 - 95%
Packaging data
Quantity per pack	1 pc(s)
Design
Product colour	Black
Performance
Charger type	Indoor
Charger compatibility	IP Phone
Power source type	AC
Compatibility	IP Phone 8821
Logistics data
Harmonized System (HS) code	85044095