[cisco-voip] 7920 Phones battery life in standby, not being used

[Erick Bergquist]

Has anyone seen where the 7920 phone battery only lasts around 3 hours
when it is registered and not being used, just sitting on a desk or
walking around with it?  I saw 2 7920s go from full to almost empty
within 2.5 to 3 hrs when they were registered and not trying to
re-connect. The phones themselves work fine for calls, etc.

Different batteries have been tried in them (1440 mAh, 1760 mAh, and
2400 mAh) and all seem to last about the same timeframe.  I know the
battery will drain quick if it can't establish a connection on
wireless and it keeps on trying but these have a connection. The docs
say the battery should get around 30 hours in standby.

I don't think it is a battery or phone issue and new batteries have
been tried with same result.  If it matters, these are being used with
a CME and they have 1130 model APs but had 1121 model APs previously
with same issue.

Erick