Ultrabook bad battery life

About a year and a half ago, I purchased an Acer TimelineUltra M3. Initially, I would get pretty good battery life and could use the laptop for 5-7 hours before it died. However, about 6 months ago I lost the charger that came with it and purchased an off brand one. After that, battery life was never as good and lasts less than 3 hours. It also takes more than 3 hours to get 100% charge. I am now forced to bring my charger with me everywhere I go. Considering that I have used this charger for almost half a year, would buying the official Acer charger restore my battery life to (more or less) what it originally was or is it too late for that?
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  1. Best answer
    Rechargeable batteries, whether NiMH or Lithium-ion have a limited number of charge/discharge cycles (typically 500-1000) before they begin to lose capacity. I believe the dropoff can be fairly rapid.
    It sounds like the off-brand charger may have been the wrong voltage. Measure it with a voltmeter if you have one to compare it to what it should be.
    As to the replacement battery, you can buy a new aftermarket battery on eBay fairly cheap, but it will have lower capacity, and likely a much lower number of cycles; or you can go to a place like BatteriesPlus, pay three times as much, but get a battery (e.g. Ray-o-Vac) that will be at least as good as the original, and will also last a lot longer. I'd go cheap only if battery life is not important to you.
  2. Try asking for Acer about new power supply brick and/or battery. They may offer you a new one (probably with a fee, though).
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