Here's something interesting.

My N900 wouldn't charge on Tuesday - I left it on the whole night!

My N900 battery full bar status lasted almost 1 whole day on Thursday???*
*with a short charge from 6pm to 7pm just to test my wall charger. working condition since it did not charge on Tuesday night.

Which makes me wonder how inconsistent is the battery usage for the N900? Could we come up with an application to trick the N900 battery usage (since actual usage does not always equal battery status). Seems to be innefficient discharges somewhere???