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What’s the Best Way to Store a Lithium-Ion Battery?

Some of us use our laptops as desktop replacements, so it doesn’t make much sense to keep the battery inside your laptop full-time. That ends up decreasing its power storage capacity. Here’s the best way to store it.

Store Laptop Battery

Storing a Lithium-Ion Battery

But will my laptop work without the battery while it’s plugged in?

The answer is yes, while plugged into AC, your laptop will work just fine even if the battery isn’t inside it, as detailed in this article. Now that we’ve got that out of the way, let’s see what the best way to store a laptop battery is.

Today, Lithium-Ion batteries are the battery type found in pretty much 99% of all all laptop PC and devices sold over that past five years. Now although most Lithium-Ion batteries will perform well for 2-3 years, if you want to extend the life of your battery, you can following a few tips.

First, before storing your battery, make sure it’s not empty. Over time, batteries will leak power so if it’s stored with no charge in it, there’s a chance it won’t accept a charge again. Since this defeats our goal of extending the life of a battery… don’t do that!

In order to lose the smallest amount of power while in storage, change your batter to 40% then unplug it and store it in a temperature controlled location. The below graph (data comes from here) outlines the most ideal charge point and temperature for battery storage.

Storage Temperature Charged to 40% – capacity loss after a year Charged to 100% – capacity loss after a year
0 °C (32 °F) 2% 6%
25 °C (77 °F) 4% 20%
40 °C (104 °F) 15% 35%
60 °C (140 °F) 25% 40%
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As you can see, 0 degrees centigrade (which translates to 32 degrees Fahrenheit) and 40% battery charge loses the least amount of power. Just 2%. The reason is because constant temperature is your best friend. Now the good news is most refrigerators hover between 34-38 degrees Fahrenheit which is almost perfect. It also provides the battery a constant temperature that rarely changes.

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2 Responses to What’s the Best Way to Store a Lithium-Ion Battery?

  1. Allen January 31, 2014 at 9:51 am #

    Constant temperature is your friend but you say to store it in the fridge and removed it every month to discharge/recharge. How is storing it in the fridge a better choice? Since there’s a large temp difference between fridge temp and its fully discharged temp opposed to just storing it in a closet where the fully discharged temp is much closer to the closet stored temp?


    • Steve Krause January 31, 2014 at 9:32 pm #

      Looking at the chart, only a 2% delta in power loss between 32F and 77F so yeah – save the hassle and just store it in the closet.

      That way you also won’t need to worry about moisture or take up space in your fridge. 😉


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