I've had my 2011 13" baseline Macbook Pro for ~4 weeks. After 21 cycles, iStat Pro says my battery health is 94%. I've calibrated it once, about 2 weeks ago, and I use the laptop like Apple says to, by running it off of battery power most of the time. I've read about this topic in some threads, but do you think this is serious enough to ask apple for a replacement battery (I have applecare)? Thanks