My brother has just begun experiencing something very weird: Yesterday, he could run his MBP 2.2 SR for 4.5 hours on battery, wireless. Today, no wireless, he can run for around 1.5 hours, tops. He uses coconut battery, and checked. Yesterday, he had 5155mAh on his battery. Today, he has 5155, but for some reason the battery just begun to drain quicker. Any insights?