We are having issues with battery life on the 8440's not lasting 8 months at best at a site with a lot of 8440 handsets. I checked the APP.LOG files of the handsets as they report battery logs. I've tracked a few batteries through all the handsets and I noticed that, as a general rule, as the fault count went up the full capacity of the battery went down. In some battery cases the full capacity went down VERY fast and fault count went up quite quickly.
What is this 'fault count' that is being tracked in the app.log files?
I do wish that the 8440s parsed this and informed the user that the battery is no good versus just appearing like there is no charge in the battery even though the battery chargers (quad stations) said the battery is full. The user experience is just frustration at that point.