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  • I'll accept your answer if you answer me this one. Is electronic engineering questions outside the scope of this forum? Commented Jun 12 at 0:52
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    4 years is pretty old for a battery. Many batteries last longer than that, even given the same usage patterns you describe, but plenty do not. Batteries are often warrantied for as little as 6 or 9 months past their manufacture date, NOT the computer ship date. The proper path for computer repair is to start with the obvious, weighted for ease and cost of replacement. The battery is the thing to start with. There is already an Electrical Engineering sister site, and you're free to present your question there. They may approach the issue in a way more to your liking. Commented Jun 12 at 14:14
  • Thanks @music2myear for refering me. I'll try over there. Commented Jun 19 at 14:21