Should I Remove My Laptop Battery To Increase its Life? [Geeks Weigh In]

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laptop battery lifeDoes running your laptop on AC power damage the battery? Should you remove the battery to increase its lifetime? If you own a laptop, these questions have probably crossed your mind before. The short answer to both questions is: most likely yes. Curious to learn why? Continue reading for all the juicy details.

To support my arguments and recommendations made at the end of this article, I have to provide some background information. So let’s start with the basics…

How Does A Laptop Battery Work?

The type of battery found in laptops today is called Lithium-Ion (Li-Ion). In this type of battery, lithium ions are loosely embedded (intercalated) in the porous carbon of the anode (negative electrode). When the battery is used, the ions flow from the anode to the cathode (positive electrode) through the electrolyte and the separator. This process releases energy and results in a discharge of the battery. When charging, energy is applied to make the ions move in the opposite direction. A charge thus forces them to return to the anode.

laptop battery life

How Do Lithium-Ion Batteries Age?

Theoretically, this process can go back and forth forever. Practically, however, the lifetime of a battery is limited. What happens is that ions get trapped and are no longer available to flow from the anode to the cathode. In other words, the battery loses capacity over time. In fact, Li-Ion batteries start aging the moment they are produced.

What Causes Lithium-Ion Batteries to Age?

Several things:

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  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.

To Remove or Not To Remove

As indicated in the introduction, the answer is: yes, remove the battery to extend its lifetime!

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.

What Should I Do To Increase My Battery Lifetime?

You can do multiple things. I wrote an entire article on this topic (link above). Below you will find a summary.

Proper treatment of a Li-Ion battery:

  • 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

* Cycle means that you discharge the battery to around 20% and then recharge it fully. Going below 20% equals a deep discharge, something you will want to avoid.

Preparing a Li-ion battery for storage:

  • charge battery to 40-50%
  • remove from laptop
  • put into an air-tight zip-lock bag
  • store in fridge at 4-8
  • re-charge to 40-50% every few weeks

When storing your battery, take note how fast it self-discharges and make sure it never goes below 20%.

laptop battery life

For times when you have to run your laptop on battery, you should have a look at this article: 20 Ways To Increase Laptop’s Battery Life

What are your experiences with laptop batteries? Do you go through all the hoops to extend the lifetime of your battery?

Image Credits:MedusArt, Pavel Ignatov, D.R.3D, Andresr

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Comments (117)
  • Kashish Garg

    Sir, as you suggested that the battery when put out of the laptop must be stored in fridge at “4-8″ what does this 4-8 means

    • Tina Sieber

      Hey Kashish, looks like the unit was removed over time. It’s supposed to say 4-8 °C.

  • liu jerry

    Hi there, reasonly I got myself a acer laptop and realize the battery was build in.
    I have wonder, can you do that on a build in battery.

    The instruction also said battery reset pinhole. Simulates removing and reinstalling the battery. Insert a papper clip into the hole and pres for for second. (So should I remove the battery?,also sorry for bad English)

  • Ivan Lopes

    Well this is a good article. but there is something that i don’t agree.
    You don’t have to remove your battery when running on AC. In fact all new batteries and the circuits responsable to charge your laptop are “Smart” so they will never overload the charge.
    And the battery will not be always in 100% full charged. At 100% the battery will not receive more charge, in instead only the pc will receive power. The other points are valid. Nice article

  • Ahmed

    Thank you for answering me , Actually I’m talking about Heat and if it will affect in battery or not when playing intense games.

    • Tina

      Oh yeah, of course! It will affect the battery, but I’m not sure to what degree. Depends on where the processor is located relative to the battery and how cooling works. It could be marginal.

  • Ahmed

    If I want to buy laptop for general uses and gaming , can I buy laptop with unremovable battery or I should buy another laptop with removable battery to remove before open intense games

    I’m talking about ( ASUS TP500LN ) , I like this laptop because its touch screen and I want it very bad but I want to protect its battery and I don’t know how!

    • Tina

      Properly designed laptops turn off battery charging and switch to A/C power once the battery is fully charged. Actually, if the battery hasn’t been discharged much and you plug it in, the laptop may switch to A/C power, but not charge the battery.

      Not sure how the ASUS laptop handles these situations, but since it’s a high end laptop, I’m sure it can handle those loads without killing the battery in the process. I’d recommend consulting a hardware expert. You can try asking at MakeUseOf Answers.

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Affiliate Disclamer

This review may contain affiliate links, which pays us a small compensation if you do decide to make a purchase based on our recommendation. Our judgement is in no way biased, and our recommendations are always based on the merits of the items.

For more details, please read our disclosure.
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