Yes:

1. Charge battery fully.
2. Shut down computer.
3. Wait 24 hours (or longer; see step 5 below).
4. Start up computer.
5. Check battery charge. If it's still nearly full, restart from step 1 with twice the time interval.
6. Charge battery fully.
7. Remove battery from computer (ideally having shut it down first).
8. Wait 24 hours, or whatever longer interval you ended up with in step 3 above.
9. Reinsert battery and start up computer.
10. Check battery charge.
11. Compare results of step 5 and step 10.

same here. i have a Dell D600 with 2 batteries. i just checked the spare, which has been in my bag unused for the last 2 months. the battery power indicator shows that it is still fully (more or less) charged. my colleague has one of the recalled Dell batteries from the recall last August. it has been sitting in a box in his office for a year (fully charged at the time) and still shows that it is about 20-40% charged (2 out of 5 indicator lights come on).

Yes.

What is being suggested is that you fully charge your battery. Leave the laptop at home and off all day, come back and check the remaining charge level.

Next day, fully charge the battery again but this time physically remove the battery from the laptop [you can still use the laptop without a battery in it with the AC adapter], leave it sitting on your desk, go to work, come back and check the charge level again - see if there is a difference in the amount of loss based on having the battery physically in or out of the laptop.

I think two weeks to go from 100% to 0% is abnormal, but a gentle, consistent, and constant discharge is VERY normal normal for laptop batteries.

Jeesh - ya gotta translate that into plain English? Ya wanna get all our geek certificates pulled, dude? What's with that? :D

maybe. Your laptop probably goes into "standby" or "sleep" mode when you close the lid. THis will draw a fair amount of power. It should go into "hibernate" after a period of time. This is basically "off" and should draw almost no power at all. Check your power settings and power scheme. Vista computers go from "sleep" to "hibernate" by themselves after a time--no setting for it.
A LiIon battery will hold a charge at room temperature for MONTHS. Something is "on" in your computer settings to drain it, although draining after a few weeks is actually pretty good, I think. It's when you laptop goes dead overnight that you have a problem with "sleep" or "standby".

Duplicate

My D610 loses only minimal power when off. My Sony Vaio will completely discharge when off if not used for a couple of weeks.

Out of curiosity after seeing this thread, I started my HP dv2000 which had been in hibernation for 3 weeks. The full charge was down to 39%. Computer is about 2 months old.