Another special TAC release (1.3.4.0.2) this time for the Cisco 7921G and 7925G IP Phones. I'm told this release is a 'quick fix' for the battery issue discovered in release 1.3.4.
Sources at TAC mentioned 1.3.5 could be out as early as end of May. Comments were also made that
1.3.4.0.2, "has been through only basic testing to verify the power consumption issues"
Battery Life After Returning From Out of Range State
The Cisco Unified Wireless IP Phone may have a short battery life after returning from the out-of-range
state. The battery life can be two to four hours long if the IP phone travels out of range for up to three
to five seconds, and then returns in range of the configured network without rebooting the IP phone.
This may occur with IP phones using firmware release 1.3(4), but not with any earlier release. If your IP
phone experiences a short battery life after it has operated out-of-range for a few seconds, you can reboot the IP phone. The out-of-range alert may be enabled in Unified CM to provide a notification anytime the IP phone leaves the service area. For more information of the status of this operation, refer to CSCtf82507, using the Software Bug Toolkit.