I’ve just realised Apple has released 10.7.3 update for Lion OS. I have been reading / searching for the update about the battery problem. I did mention that the SMC reset fixed my battery problem, that fix plus the gfxCardStatus Apps helps a lot to improve battery life. However, my MBP is never able to reach that battery life prior to the Lion upgrade.
I am going to download the new update, have the MBP reset back to factory and test the battery life again.
According to Apple, the 10.7.3 will fix the following….
Add Catalan, Croatian, Greek, Hebrew, Romanian, Slovak, Thai, and Ukrainian language support
Address issues when using smart cards to log into OS X
Address compatibility issues with Microsoft Windows file sharing
Address an issue printing Microsoft Word documents that use markup
Address a graphics performance issue after sleep on some earlier iMacs that use ATI graphics
Resolve a Wi-Fi connection issue when waking from sleep
Address an issue that may prevent Safari from opening before joining a wireless network
Fix a potential issue authenticating to an SMB DFS share
Include RAW image compatibility for additional digital cameras
The graphics performance issues may be related to the battery problem, I will see if that fix the battery problem.