What to Do If Charger Doesn't See 18650 Li-ion Battery

Introduction: What to Do If Charger Doesn't See 18650 Li-ion Battery

About: just do it yourself

What to do if the battery doesn't charge, charger doesn't see the battery for 2 reasons: low voltage on it or triggered thermal protection.

Step 1: Measure the Voltage on the Battery

Step 2: If the Battery Has at Least Some Voltage.The Battery Can Be Put in Parallel With Another Working Battery.

10 seconds will be enough.

Step 3: Еhe Voltage on the Battery Has Increased, Now You Can Try to Put It on Charge.

But if the charger does not react again, the operation must be repeated

Step 4: And Repeat Until the Battery Starts Charging

Step 5: If the Battery Voltage Is 0, Thermal Protection Has Tripped

Step 6: the Membrane Under the Positive Contact Arched From the Pressure Inside the Battery

Step 7: After Returning the Membrane Back, the Battery Has Came to Life

Step 8: Then You Need to Do the First Operation and Now the Battery Is Working

Step 9:

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    3 months ago

    The 10 second parallel trick worked for me... Thank you very much for a really helpful post.

    Shaikh Muhammad
    Shaikh Muhammad

    Question 5 months ago

    Hello, I have bought a new battery and it has voltage of 3.9V approximate, but there is no current flow while charging or using it with anything, I'm not going to replace it or throw it, I want to know that what's wrong, thank you


    3 years ago

    I'm glad you could fix it :)


    Reply 3 years ago

    I am also very happy, thank you