How to Store Lithium-ion Batteries Safely When Not in Use

Lithium-ion batteries have many advantages, including high voltage, large compacity, high energy density, and long lifespan, to name just a few. These are popular batteries for smartphones, electric cars, and home energy storage systems.

Despite the benefits of lithium-ion batteries I mentioned above, you should be aware that Lithium-ion batteries sometime could be dangerous because they can overheat, catch fire, or explode. Thus, it’s necessary to get better knowledge about the different types of lithium-ion batteries, what they are made of, how they work, and most importantly, understanding the best way to store lithium-ion batteries when not in use, to minimize the risk of lithium battery fire or explosion.

In this guide, I’ll explain everything you need to know about storing lithium-ion batteries, for example:
● Where is the best place to store a lithium-ion battery?
● Is it better to store lithium batteries charged or uncharged?
● At what temperature should a lithium-ion battery be stored?

I’m sure we still have a lot of questions to answer, so let’s dive right in.

Notes: This article relates to both lithium batteries and lithium-ion batteries.

Lithium-ion Battery Storage Requirements


The ideal temperature for storing the lithium battery is between 5 °C and 20 °C (41 °F and 68 °F). To be more specific, you can check the labels of your battery type and set the proper temperature before storing them. And there’s one thing to remember, Li-ion battery degradation is mainly caused by chemical exothermic reactions, and the high temperature will accelerate the degradation of lithium-ion batteries. So, keep your lithium battery at low or room temperature to slow down the decomposition process of the battery.

Lithium-ion Batteries and Temperature


For best results, keep the lithium-ion batteries at a relative humidity of about 50%. If the lithium or lithium-ion battery is exposed to n high-moisture environments, it will lead to the reduced performance and reduced lifespan of lithium-ion batteries. If possible, refrigerate the battery in a dry environment to extend the battery life.

Lithium-ion Batteries and Humidity

State of Charge

When not using your lithium-ion batteries, store them at around 40% -50% state of charge (SoC). And keep in mind that lithium-ion batteries should never be stored fully charged or completely discharged. On the one hand, lithium-ion batteries will gradually self-discharge, and they will lose large amounts of their usable life if they’re fully charged all the time. On the other hand, storing lithium-ion batteries fully discharged will be harmful to the battery cell.

Lithium-ion Batteries and Discharge Voltage

How to Store Lithium-ion Batteries: Do’s and Don’ts

In the previous paragraphs, you’ve learned the three main factors that impact the battery’s health, which are temperature, state of charge, and humidity. The following parts are the general guidelines for you to properly store your lithium-ion batteries and maximize the lifetime of your lithium-ion battery.

How to Store Lithum-ion Battery Safely

What You Should Do

1. Remove the battery from the device before storing it.
2. Use plastic, electrical tape, or other insulating materials to protect the battery terminal.
3. Keep the battery in a fireproof container.
4. Remove flammable, combustible materials, and liquids from the storing area.
5. Handle lithium-ion batteries with caution and wash hands after handling them.
6. Cover the discarded batteries with insulating paper to prevent explosion and fire.

What You Shouldn’t Do

1. Do not use damaged, swollen lithium-ion batteries.
2. Do not expose the Li-ion batteries to excessive vibration.
3. Do not store batteries in high or low temperatures.
4. Do not place the Li-ion batteries in the microwave or high-voltage environment.
5. Do not charge the lithium battery with inferior or other battery chargers.
6. Do not put the lithium battery in water.

FAQs about Storing Lithium-ion Batteries

Do lithium-ion batteries degrade in storage?

Yes. All batteries, including lithium-ion batteries and other types of batteries, will degrade over time even if you don’t use them. It is reported that a fully charged lithium-ion battery will reduce 20% of its capacity after a year of storage.

How to store your Lithium-ion batteries over winter?

Lithium-ion batteries are famous for their poor cold-weather performance. If you store the battery at freezing temperatures, it will do harm to the battery cathode, making it separate from other parts of the battery. During winter, I recommend storing lithium-ion batteries at 50% state of charge in an environment above freezing.

Where is the best place to store lithium batteries?

The ideal place for storing batteries should be away from sunlight, heat, and humidity. You can find a cool, temperature-controlled, and dry location to store your lithium-ion batteries. Places like refrigerators, garages, basements, and bathrooms are not recommended for battery storage.

To Sum Up

Now that you’ve learned all the guidelines and requirements about lithium-ion battery storage, your lithium-ion batteries will be stored safely if you make sure to keep them at the correct temperature, humidity, and in the correct state of charge. If you still have questions about storing your lithium batteries, send us a message or leave your comments below, our professional team will offer you personalized lithium-ion battery storage solutions.

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