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3-9
Cisco Wireless IP Phone 7920 Administration Guide for Cisco CallManager Release 3.3 or Later
OL-3930-02
Chapter 3 Setting Up the Cisco Wireless IP Phone 7920
Providing Power to the Cisco IP Phone
Providing Power to the Cisco IP Phone
The Cisco Wireless IP Phone 7920 uses a battery for power. This section includes
the following information about installing and charging the battery:
• Installing the Battery, page 3-9
• Power Supply for Charging the Battery, page 3-11
• Charging the Phone Battery, page 3-12
• Using the Desktop Charger, page 3-13
Installing the Battery
The Cisco Wireless IP Phone 7920 uses a battery for power. You can choose
between these two battery models:
• Standard
• Extended
Battery Design
Table 3-3 describes the types of batteries available for the Cisco Wireless IP
Phone 7920.
Note Standard batteries might be either 1440 mAh or 1560 mAh capacity.
Table 3-3 Batteries Available for the Cisco Wireless IP Phone 7920
Type Technology Capacity Talk Time Standby Time
Standard Lithium-ion 1440/1560 mAh 3.5 hr 21 hr
Extended Lithium-ion 1960 mAh 4.25 hr 30 hr