Hello My battery on my mac book pro late 2009 model is not charging, no idea why. what I can tell you the light on the magsafe is off. The mac magsafe port is dirty, I have power coming to the mac, I charged it up 5% in 4 hours. I downloaded coconut battery Current charge: 704 mAh Maximum Charge: 6155 mAh 11% Current capacity: 6155 mAh Design capacity: 6500 mAh 94% Mac model: MacbookPro 5,4 Age of mac: 23 months Battery load cycles 820 Battery temperature: 31°C Battery power usage: 572.9 Watt I have done everything I can think of to get it working. Any additional advise would be great.