At how many battery cycles should I consider replacing my battery? My battery has become quite a pain in the neck recently, It's not lasting much more than about 2 or 3 hours and that's usually just using basic programs like chrome or pages etc. It's difficult for me because I use it quite a lot at school, and unfortunately school is a lot longer than 2-3 hours...I also use a lot of very intensive programs like blender and unity, but usually I try to only do that at home with my charger.



At the moment it tells me I've done 621 cycles and tells me its in normal condition (pfft, normal...) Is that actually normal? Also, should I be thinking about replacing it with a new one, if so, is it expensive and will it actually make much of a difference, and if it shouldn't be replaced what can I do to make it better?

Thanks, Matthew

Edit:

This is what CoconutBattery tells me:
You haven't mentioned what's the model of the Mac you are using, Apple's Determining battery cycle count for Mac notebooks  will tell you more about the Charge Cycle.

Also in case you are still in warranty, which I assume you are not cause of so many charge cycles, you can go to the Apple Store and get the battery diagnosed, if they find a problem they will replace it.