Destination unknown? I miss my MacBook

This mornign my work laptop died while I was giving a presentation.  The battery life has slowly degraded over the last 5 or 6 months, until this morning it lasted barely 40 minutes.  Meanwhile my MacBook Pro at home has no problem working for 3 hours...which I used to think wasn't very good.

And here is how bad things have gotten:
It doesn't even recognize the battery!  AAARGH!!!!!

UPDATE: Switched out the battery- we seem to be golden, now.