OS X tells me my battery needs to be replaced on my 15&quot; rMBP, it&#x27;s apparently at under 80% charge capacity now.<p>According to &quot;System Information&quot;, I&#x27;ve done a mere 359 cycles - and according to their website, &quot;Your battery is designed to retain up to 80% of its original capacity at 1000 complete charge cycles.&quot; [0]<p>Of course their warranty on defective batteries conveniently runs out after just one year. I&#x27;ve been meticulous about only charging it with genuine ($80+) chargers, including at home, at work, one in the car, and one in the carry-on. Someone should tell them about this new tech.<p>0: <a href="http:&#x2F;&#x2F;www.apple.com&#x2F;batteries&#x2F;service-and-recycling&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.apple.com&#x2F;batteries&#x2F;service-and-recycling&#x2F;</a>