•The standard battery requires about 3.5 hours to become fully charged and provides up to 3.5 hours of active service time or 21 hours of standby time.
•The extended battery provides up to 4.25 hours of active service time or 30 hours of standby time. The battery becomes fully charged in about 4.5 hours. For more information about charging the battery, refer to the “Desktop Charger” section in the Cisco Wireless IP Phone 7920 Accessory Guide.
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