Installing Or Removing The Phone Battery - Cisco 7921G - Unified Wireless IP Phone VoIP Administration Manual

Installing the Cisco Unified Wireless IP Phone 7921G
Table 3-3
Type
Standard
Extended
Table 3-4
the battery is fully charged, and leave the batteries in the charger with no ill effects. Li-ion batteries can
be partially charged without shortening the battery life. Batteries should handle up to 4000 recharges.
Battery life varies because of environmental factors.
Note
Table 3-4
Battery Type
Standard
Extended
The following sections provide information about the battery and charging the phone:
•
•
•
•

Installing or Removing the Phone Battery

To install the battery in the Cisco Unified Wireless IP Phone use
Procedure
Step 1 To install the battery, insert the battery catches (as shown in
bottom of the Cisco Unified Wireless IP Phone 7921G. Ensure 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.
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified Communications Manager Release 7.0
3-8
Batteries Available for the Cisco Unified Wireless IP Phone 7921G
Technology
Lithium ion (Li-ion)
Li-ion
shows the charging time for the two types of batteries. You can stop charging the battery when
Battery Charging Time Information
Power Supply
Connected to Phone
2 hours
3 hours
Installing or Removing the Phone Battery, page 3-8
Using the Power Supply to Charge the Phone, page 3-9
Using the USB Cable to Charge the Phone, page 3-11
Installing and Using the Desktop Charger, page 3-13
Chapter 3 Setting Up the Cisco Unified Wireless IP Phone 7921G
Talk Time
Up to 11.5 hrs
Up to 15.5 hrs
Phone Connected to PC
with USB Cable
5 hours
7 hours
Figure 3-1, and follow these steps:
Figure 3-1) in the corresponding slots at the
Standby Time
Up to 150 hrs
Up to 200 hrs
Power Supply with
Desktop Charger
2 hours
3 hours
OL-15985-01