Prior to installing Leopard I was getting about 1.25 hours on a full charge on my MacBook Pro while streaming on Justin.TV and getting 3.5 hours with the backlight dimmed and just typing articles. Since installing Leopard, if I�m just browsing the web with the backlight up and airport turned on, I�m only achieving 1 hour of operation on a full charge. If I dim the monitor and turn of airport it�s about 1.75 hours. Streaming on Justin.TV takes my battery down to just a few minutes.

I�ve calibrated my battery and don�t see any thing on Apple Support Discussions on the issue but it looks like Leopard greatly affects my battery life. I purchased this MacBook Pro new in the box from an eBay seller right after the 2.4Ghz MBPs came out (this is a 2.33) and the battery life has been great. Battery Health Monitor, an application I found via MacUpdate shows that I�ve only performed 50 charge cycles on this unit so I�ve got 75% life left on the battery. With that said, I don�t feel that the battery needs to be replaced.

I�ll perform more testing but as of now, 1 hour of battery life on a full charge and just web browsing is crap! I know Apple has never had a notebook that gets the full 5 or 6 hour battery life that they advertise in real world tests but 1 hour is just crap especially that I got 3 hours doing the same stuff in Tiger.