The battery in my MacBook isn't holding a charge like it used to so I fired up Coconut battery just to see the condition my MacBooks battery was in. (It is in the yellow range). As a bonus, Coconut Battery gives the model of your MacBook and its age. Wow, my MacBook (model 1,1) is 56 months old. Just out of curiosity, how old is your MacBook? late edit: since others have listed the details, here are mine: Battery load cycles: 351 (I think this is my third battery) Battery capacity: 49% October 2015 update My MacBook finally gave up the ghost and no longer boots up. This happened about a month ago. I think it is a hard drive issue (I get a flashing folder with a "?" mark graphic when booting). Everything important on it was backed up but I will put the drive in an enclosure to see if I can recover anything. Let's see. In May 2011 it was 56 months old. +7 months to bring it to 2012, +36 months (2012, 13, 14), +9 months in 2015 = 108 months = 9 years exactly! No complaints here. It was a long and useful life. I'm retired now and my needs have changed. I use my iPhone and iPad for everything mobile and my iMac and mini Mac connected to my TV for everything else. I may not replace the laptop after all!