I've got a Mid-2010 15" MBP, and I'm wondering if it's time to get the battery replaced. I recently timed a full battery discharge, and it lasted 2 hr 55 min. This was with Photoshop running, so presumably the discrete graphics card was powered up the whole time. Does that seem like bad battery life, or is it normal? I think the advertised battery life for this model is 7-8 hours, of course that's just with light use (browsing, word processing). But still, it would be nice to be able to depend on, say, a solid 5 or 6 hours of work away from a power outlet. FWIW, in System Information, it says that the battery Cycle Count is 526. I just don't want to spend the dough on a replacement battery and find that I only get an extra half hour out of it. Thanks for any replies.