Ok - bit of a funny one here. Originally I had the Clarivue Privacy screen protector fitted to my N900. I wrote it wasn't fully up to my expectations so I was ordering the Ultra-clear version.

I applied the Privacy edition on the day of the PR1.1 firmware update and since that point, my battery life on the N900 has barley lasted the day.

Skip to today. I've had the Clarivue Ultra-clear fitted (which is excellent btw) for the last 4 days. I wouldn't say my usage has changed nor have I installed or uninstalled any extra apps. My battery life has suddenly become amazing, its past half way through the day and it still has 90% of its battery remaining with moderate use.

I've had my N900 since mid-december so it cant be down to battery cycles (??) but it seems too coincidental. My only guess can be it was down to the privacy filter covering the proximity sensor, perhaps causing it to constantly activate/deactivate?

This is a pure up in the air guess and could be nothing to do with my battery drain so I'll stick the filter back on over the top during my working days next week and see if it makes a difference..