Got a brand-new 13-in 2.53GHz Macbook Pro a few weeks ago. Last week it started showing that the battery needed servicing. Then it seemed to fix itself but would randomly go into power saving mode when I was using it. I took it to an Apple store and they replaced the battery and reset the SMC. The problem is that the new battery just doesn't seem to last as long as the old one. I followed the instructions to calibrate the battery (the Apple KB article), but when I plugged the power back in, it still had 5% juice left in the battery. The new battery seems to have healthy figures compared to the old one. I've reproduced the figures from System Info below. Any help or advice to completely flush the battery?