Cisco 7921G - Manual (Page 11)

3-11
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Installing the Cisco Unified Wireless IP Phone 7921G
Table 3-4 shows the charging time for the two types of batteries. You can stop
charging the battery when the battery is fully charged, and leave the batteries in
the charger with no ill effects. Lithium ion batteries can be partially charged
without shortening the battery life. Batteries should handle up to 4000 recharges.
The following sections provide information about the battery and charging the
phone:
• Installing or Removing the Phone Battery, page 3-11
• Using the Power Supply to Charge the Phone, page 3-12
• Using the USB Cable to Charge the Phone, page 3-15
• Installing and Using the Desktop Charger, page 3-17
Installing or Removing the Phone Battery
To install the battery in the Cisco Unified Wireless IP Phone use Figure 3-1 , and
follow these steps:
Procedure
Step 1 To install the battery, insert the battery catches (as shown in Figure 3-1 ) in the
corresponding slots at the bottom of the Cisco Unified Wireless IP Phone 7921G.
Make sure that the metal contacts on the battery and the phone are facing each
other.
Step 2 Press the battery to the body of the phone until it locks into place.
Step 3 To remove the battery, press up on the locking catch, then lift and remove the
battery.
Table 3-4 Battery Charging Time Information
Battery Type
Power Supply
Connected to Phone Phone Connected to
PC with USB Cable Power Supply with
Desktop Charger
Standard 2 hours 5 hours 2 hours
Extended 3 hours 7 hours 3 hours