I just got a new battery for my 15" MacBook Pro (2007), I have yet to install it. On my current battery I get maybe an hour, if I am lucky. I put my laptop in sleep mode all the time, so maybe that caused the problem, but it's always plugged in when i do that. I also have my iPhone connected to it all night, while in sleep mode, while I actually sleep. I added a larger hard drive and RAM to my laptop, but I was getting about the same battery time before I put the hard Drive in. Also when I first got my Laptop I let the batter die then power it up, I did this a few times before I started to unplug the laptop and just use the battery for power. Since I have had the laptop for over 2 years I know the first year the battery worked well. I do not expect batteries to last forever, but I know many people who's batteries still work like new. So I am looking for help/tips before I put the new batter in, so I get the most out of my purchase. Thanks you!