Do Lithium Batteries Leak?Complete Solution Guide

You can get an accurate answer. It is unlikely that a lithium battery will leak under normal conditions. Rarely do lithium batteries leak, which is a well-known problem with alkaline batteries. Thanks to advanced technology, lithium batteries may not leak under natural conditions. However, be sure to store them in a dry, cool environment and retain about 50% to 70% of their charge. If you do so, rest assured that your batteries will last a long time.

However, lithium batteries are not completely immune to leaks. There are many reasons why lithium-ion batteries can leak. For example, poor manufacturing quality and improper use methods can increase the likelihood of lithium batteries leaking. For lithium batteries themselves, short circuiting is the biggest enemy.

The following details the causes of lithium battery leaks and how to prevent lithium battery leaks and other issues.

What causes a lithium battery to leak?

1. Overcharging

When a lithium-ion battery is overcharged, the electrolyte inside begins to break down. This process produces gases that can escape from the battery and cause it to expand. If the pressure is too high, the battery may burst and leak.

To prevent this, Aolithium lithium-ion batteries are equipped with a BMS system to protect the circuitry, which turns off charging when the battery is full. As a result, this makes it difficult to overcharge the battery, which can lead to battery leakage.

2. Dropped or punctured

If a lithium-ion battery is damaged, such as dropped or punctured, it can also cause the battery to leak. Damage can cause the electrolyte to escape and mix with the rest of the battery, leading to chemical reactions and leaks.

Most top lithium battery manufacturers perform battery drop tests to avoid any damage that could cause the battery to leak. Drop testing is used to determine the structural integrity of the battery and its ability to withstand the shock that causes damage. Purchasing from Aolithium.com will help ensure that your battery is less likely to leak.

3. Manufacturing defects

In rare cases, a manufacturing defect can cause a battery to leak. This is usually due to a problem with the seals used to keep the electrolyte inside the cell. If they are not properly sealed, they can allow the electrolyte to escape and leak.

Buying new batteries from a reputable source can help avoid this problem. Excellent lithium battery manufacturers such as Aolithium have quality lithium iron phosphate products.

4. Temperature

If a lithium battery overheats, it can also cause the battery to leak. Extreme temperatures will break down the electrolyte and allow it to escape from the battery. This is why it is important to store lithium batteries in a cool, dry place.

Proper storage will prevent damage to the battery and extend its life expectancy (typically 1-3 years). Please follow these battery storage precautions:

  1. Store in a well-ventilated area
  2. Store at temperatures between 40ºF and 80ºF
  3. Keep away from direct sunlight and heat sources
  4. Avoid freezing
  5. Cover the terminals when not using the battery
  6. Prevent the terminals from touching each other
  7. Keep away from high temperature

5. Prolonged placement

When a battery is left in a device for too long, especially when not in use, it can leak. Since the device is not in use, it will still "check" the remaining charge periodically. This puts some stress on the battery and puts it at greater risk of leakage.


How to determine whether the lithium-ion battery is leaking?

1. Appearance inspection

By manual inspection, observe whether there is electrolyte outflow from the battery and whether the appearance is deformed. This method is the most traditional method and the easiest to operate in reality, but it relies on people and is poorly dummy-proof. This is the original inspection method.

2. Vacuum detection

Using the characteristics of the leaking battery bulge, the whole battery is vacuumed, so that a large pressure difference is formed inside and outside the leaking battery. The electrolyte may flow out along with the air inside the battery, and then the appearance inspection is carried out to pick out the defects.

This method has a low detection rate, but is also commonly used due to good operability.

3. Leakage substance detection

Once a battery leaks, the electrolyte inside it will flow to the outside of the battery. If the electrolyte can be sensitively detected, it can determine whether the battery is leaking or not.

The limitation of this method is that there is no formal testing mechanism. It is particularly sensitive to the electrolyte and has fewer applications.

How to deal with the lithium battery when it starts to leak?

  1. Check the battery shell. In many cases, the shell is damaged due to unreasonable battery installation, weld slag inside the battery box of the frame, knock caused by the chassis of the frame is too low, etc.
  2. Remove the cover to check if there are traces of acid leakage around the safety valve, and then open the safety valve to check if there is electrolyte flow inside the battery.
  3. If there is no abnormality in the first two steps, you need to conduct gas-tightness test, i.e., pressurize and inflate in water to see if there are bubbles. If there is, it means there is a leak, if not, it means it is normal.
  4. When charging, you need to observe whether there is any flowing electrolyte, and if there is, pump it out.
  5. Once the leakage area is found, use a knife to clean around it. And use the special glue of the battery to glue the leakage port firmly.

The cause of battery leakage has a lot to do with the quality of the battery itself, so users must recognize Aolithium high quality lithium-ion batteries during the purchase process.


What should I do if the battery continues to leak?

If the battery is leaking, it needs to be taken out of service and disposed of. You do not want to risk damaging other equipment or hurting people around you. You should also take steps to prevent water from entering the battery compartment.

If the battery is outside, cover it with a sturdy tarp or other material.

If you are disposing of a battery in your vehicle, remove and replace it as soon as possible. Again, this is to protect other equipment and prevent water from entering the vehicle.

You should also contact the Aolithium service department who will provide instructions on how to dispose of the battery in a safe and responsible manner.

If you find that the battery is still leaking. You will need to turn off the device and disconnect it from the battery. It is important to remember that leaking batteries can start a fire or produce toxic fumes. Always keep a fire extinguisher nearby when charging or maintaining the battery.

How to prevent lithium batteries from leaking?

1. Store them in a cool and dry place

Storing lithium batteries in a cool, dry place will help extend their life and prevent them from leaking. The ideal temperature for storing lithium batteries is between 32°F and 77°F (0°C and 25°C). 

2. Do not overcharge

Overcharging lithium batteries can cause them to leak, so it is important to avoid doing so. If you are using a lithium-ion battery charger, make sure it has overcharge protection to prevent this from happening.

3. Regular inspection

Regularly inspecting lithium batteries for signs of damage or defects is a good way to prevent battery leakage. If you find any damage, such as cracks or puncture holes, replace the battery immediately.

4. Prevent metal objects from leaking

Keeping lithium batteries away from metal objects helps prevent them from being damaged and leaking. This is because metal objects conduct electricity and can cause short circuits that can damage the battery.

5. Use the right type of battery

Using the wrong type of battery in your device can lead to leaks. Therefore, make sure you use the correct type of battery for your device. For example, if you are using a lithium-ion battery, make sure it is compatible with your device.

6. Do not puncture or drop them

Make sure not to pierce or drop the lithium batteries as this can easily damage them and cause them to leak or damage the device.

7. Follow Aolithium's instructions carefully

You can help prevent lithium batteries from leaking if you follow the manufacturer's instructions carefully. Don't try something you're not sure about, and if in doubt, consult a professional. Buying a cheap battery from an unknown source is not worth the risk.

By following the tips above, you can help ensure that your lithium battery will last a long time and not leak.


Lithium batteries are safe, as long as you take the necessary precautions to prevent them from leaking. There are six main types of lithium-ion batteries, of which lithium iron phosphate (LiFePO4) is considered the safest one. This is due to its low resistance and high thermal runaway threshold, with inherent safety and high stability.

You must also want to know

What should I do if my lithium-ion battery is punctured?

If a lithium battery is damaged in an accident, assess the situation immediately and always proceed with caution.

If you don't already know the chemistry of the battery and the type of battery, find out as soon as possible. The proper procedure for handling a lithium-ion battery after a puncture depends on the type of battery you have. 

If you puncture a soft pack or prismatic lithium-ion battery, act quickly. You must leave immediately, as these types can easily catch fire. If possible, notify the fire department. If there is no fire after 24 hours or you have a small fire under control, you can safely remove the battery from the electrical system. 

If you have somehow punctured a cylindrical battery, proceed with caution, but this is a less serious emergency. Remove the punctured cylindrical battery from the electrical system as soon as possible and place it where the fire will not spread to prevent it from igniting. Call your local fire department for advice on how to proceed.

In both cases, you must comply with any local, state or federal laws that may apply when dealing with punctured or damaged lithium-ion batteries.


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