Damaged Lithium Ion Battery

Battery damage can not be avoided. What we should do is to figure out why our batteries are out of work and then get methods to prolong battery life.

Today, we ear going to talk about all details of battery damage and death.

The following is the tablet of this article. Hope it is helpful to you.


  • What will damage lithium ion batteries?

  • What will happen if a  lithium ion battery is already damaged?

  • What signs can we get from a damaged lithium ion battery?

  • How to check damage lithium ion batteries by voltmeter?

  • What should I do if my battery is failing?

  • How to deal with failing lithium batteries?

  • How to store Damaged  lithium batteries?

  • Can I repair my damaged lithium battery well?

  • How can I prevent adamaged lithium battery fire?

  • How To Look After Your Lithium Battery?

What will damage lithium ion batteries?

We will first illustrate factors that influence our battery. Just like when human get ill, they will come to hospital to find out why they are sick. Generally, doctors will always give two categories reasons—internal reasons and external reasons. Same things with batteries, here are internal and external reasons:

External Factors:

  • Water/Humid environment:

Water molecules seep into the battery which will corrode internal metal components, when batteries be in a humid environment for a long time.

  • Physical Damage:

For example, if a battery falls from 20th floor, its body will smashed into pieces. If a battery is hit by a high speed car, it will get lethal force. For a slightly lighter hit, it will cause internal short circuit. We know that short circuit will generate heat will give a chance for battery to burn itself.

  • Temperature: 

 Too HOT or too COLD will both cause damage in a way.

Internal Factors:

  • Manufacturing defects
  • Low quality components

Above two factors belong to congenital defects which we can not avoid when we already get them. When we meet this kind of problems, we directly choose another battery brand.

  • Over discharging:

Over-discharging refers to the battery is still in discharging after reaching end-off voltage. Over discharging will increase internal gas pressure, destroy intersections of cathode and anode materials, dissolute electrolyte and increase internal resistance. All of these bad influence will decrease battery capacity and can not be reversed.

  • Over Charging:

Over charging refers to the battery is still in charging after reaching cut-off voltage. Over charging will release a mass of heat which will lead to short circuit. There is a risk of burning and explosion.

So what will happen if a lithium ion battery is already damaged?

We divided consequences into lower-risk consequences and higher-risk consequences.

  • Higher Risk: threaten users safety

Self burning


Electrolyte leakage: toxic and flammable materials come out

  • Lower Risk: degrade battery performance

Voltage decreases

Current decreases

Capacity reduces in the end

In brief, the most terrible consequence is explosion. Although battery protection system is already improved and explosion risk is very low, we can not ignore it. We need to observe our battery in case of damage.

What signs can we get from a damaged lithium ion battery?

Battery will give different SOS signs in different stage. We also divide them into two parts:

Signs of higher-risk:
  • Noise

         Failing lithium batteries have also been reported to make hissing or cracking sounds.

  • Overheating battery:

         It’s completely normal for batteries to generate some heat when charging or in use. But if your device’s lithium-ion battery feels extremely hot to the touch, there’s a good chance it’s defective and at risk to start a fire.

  • Swollen battery:

        When a lithium battery fails, another common sign is battery swelling. If your battery looks swollen, you should stop using it immediately. Similar signs include any type of lump or bulge, or leakage from the device.

  • Unusual Smell:

         This one is a little more obvious. But if your device is smoking, a fire has already started.

  • The battery is discolored

Signs of lower-risk:

  • The working voltage is low

  • The battery capacity is reduced

  • The self-discharge rate is high

We can feel or see higher-risk signs directly from battery itself. Nevertheless, we can not accurately detect voltage and capacity, so we need ask voltmeter or other instruments for help.

You do not know how to use voltmeter?

That’s OK.

This article will taught you step by step: