Ordered this for dad, worked fine for 6 months and battery stopped working.
Took it to service center and they said, most of these phones are coming back with this problem.
One of the reason for buying this phone was the battery backup. : (
Lucky it was under warranty, the service center folks told that most likely the battery will fail again after 6 months, there were multiple cases it seems.
Not sure how much I will have to spend next time.
Irresponsible Panasonic!