MBP Battery shows 1:35 after calibration - How to improve?

My MacBookPro battery was giving me about 35 minutes of use unplugged, so I found the "Calibration" instrux. I ran a movie continuously looping until the computer shut down. I left it off overnight, then charged it completely the next day.
When I next unplugged it, it at first showed 1:35, but it actually shut down after just 37 minutes.
I've searched for recall info, but have found nothing -- can anyone contribute info about this?
Thankx -- Bill

Contact AppleCare. Your battery is prematurely failing. Apple spec is 80% health for 300 cycles. You are at 31% health after 120 cycles (assuming you have a 15"; it's worse if you have a 17"). Apple extended the battery warranty to two years for all Core Duo machines (you don't state in your profile if you have a core duo or a core 2 duo, but many C2D batteries have been replaced under this program as well.
The link is below, have it handy when you talk to Apple as some techs are unaware of the program. There is a recall for specific serial numbers they may mention, which you likely do not qualify for, but the link below is a different program.
http://www.apple.com/support/macbook_macbookpro/batteryupdate/
Hope this helps...
Hope

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