What Causes Lithium Ion Batteries to age?

Discussion in 'Off-Topic Forum' started by Daniel Martinez, Dec 8, 2016.

  1. Daniel Martinez

    Daniel Martinez New Member

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    Hi I was looking at buying a laptop and it stated it had a Lithium Ion battery. I read a bit about them and it was stated that they eventually stop working, why is this?

    - Daniel
     
    John Lyons likes this.
  2. John Lyons

    John Lyons New Member

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    Here is a summary of reasons for Lithium Ion Battery Aging:
    1. High voltage and Overcharge
      Laptops typically have a charge threshold, which prevents overcharging and high voltage. However, constantly keeping the battery at a full charge also is a stress factor that contributes to aging.
    2. Heat
      Room temperature (21°C / 70°F) or higher temperatures promote chemical reactions, ultimately causing Li-Ion batteries to lose capacity.
    3. Low Temperatures
      Temperatures below 0°C (32°F) can damage materials inside the battery.
    4. Prolonged Storage
      Li-Ion batteries self-discharge at a rate of approximately 8% per month at 21°C (70°F). This increases with higher temperatures. When stored over long periods of time, the battery can reach a state of deep discharge (charge below 20%).
    5. Physical Shocks
      Batteries can break.
    A way of improve your battery life:
    When you continuously run your laptop on a reliable AC power source, you should definitely remove your battery. Firstly, the battery will not be exposed to heat from your laptop. Secondly, there is not even a remote chance that it will be overcharged or exposed to high voltage. Hence, removing the battery eliminates the two main causes for battery aging.

    When I say remove, I don’t mean that you should simply take out the battery. Please turn off your laptop, remove the battery, and then boot your laptop. For safety reasons, please do not remove the battery while your laptop is running.

    • never discharge battery below 20%
    • always partially discharge, then recharge
    • cycle* battery every few weeks or after 30 partial dis/charges
    • charge at lower voltage (if possible)
    • never leave charged battery in laptop when running on AC power
    --
    Regards,

    John Lyons
    john.lyons@hotmail.co.uk
     
    James Buddrige likes this.
  3. Daniel Martinez

    Daniel Martinez New Member

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    Thank You John for your in-depth response, I am now confident about the battery situation. Can't wait to receive my new laptop.

    Best Regards,

    Daniel
     
  4. Derek03

    Derek03 New Member

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