I had recently restored OSX and my original battery charge was 4221 out of 5500 viva coconut battery. I could use it for around 2-2:15 hours. After the restore it showed 2200 and the battery would die out at around 1-1:15 hours. I just ordered a new battery from fastmac 4 days ago and now my battery just returned to normal.......coconut battery is showing 4221 again and the battery icon shows 65$ remaining with 1:53 hours left.....which is amazing since this is a core duo model with 27 months and 190 load cycles on it. Is this normal? It's weird that software can control battery life...... since I experienced first hand that when it showed 4221 it was nearly at 2 hours and when it was at 2200 it died prematurely at 1 hour. Btw.....this is blowing my mind.