I just bought a replacement battery for my two-year-old MacBook. I can't get my computer to charge it beyond 75%... what am I doing wrong? I've done three complete cycles of charging 24 hours, then discharging completely, then charging again. I just finished a 36 hour recharge with the computer turned off. Now I'm looking at Coconut Battery, which says: Current Battery charge: 3890 mAh Maximum Battery Charge: 5344 mAh Current Battery Capacity: 5344 mAh Original Battery Capacity: 5600 mAh Battery Load-Cycle: 4 Age of your Mac: 28 months Charger connected: Yes Battery is charging: No What's the trick to get this thing fully charged? Thanks.