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  • 22% degradation in 2.5 years is maybe slightly unlucky, but not unreasonable. It does seem a little odd that after calibration it doesn't reach 100% of a lower value. I assume you've tried shutting down and plugging in overnight?
    – Chris H
    Commented Dec 3, 2015 at 9:12
  • I tried various ways: draining to 4% then charging fully, draining even to zero once, upcharging from 50-70%, did leave it for a 10hrs charging from 4%, tried "ladder": 30->50->30-60% (I need it to be portable for some time). But no, it stuck.
    – user529094
    Commented Dec 3, 2015 at 9:22
  • ... My machine is at least twice as old (I have directories last modified in 2011 that were created at installation). I have a similar amount of degradation to you but for a while my laptop wasn't seeing much use, just powered down and partially charged.
    – Chris H
    Commented Dec 3, 2015 at 9:24
  • Then I suggest a new battery is in order. I've bought third party battteries from reputable sources/brands in the past, with success., And by reputable I mean the actual seller, not the marketplace owner.
    – Chris H
    Commented Dec 3, 2015 at 9:25
  • I edited my question to include some more detail.
    – user529094
    Commented Dec 3, 2015 at 9:26