A lot of people have been asking me about how to test the protection of a 18650 battery. I’ve decided to write up a quick guide on how to do so.

The 18650 battery is a popular choice for portable devices because of its high capacity and long life. It also has a reputation for being very safe, which makes it ideal for use in many types of devices.

The Basics.

To test the protection of an individual 18650 battery, simply discharge it until it reaches 0% (or less). If the battery does not reach 0%, then it is protected. However, if the battery does reach 0%, then it should be replaced immediately.

Testing with a Multimeter.

You can use a multimeter to test the protection of a battery by measuring its voltage while discharging it. This will tell you whether the battery has reached 0%.

Testing with a Cell Tester.

If you have a cell tester, you can use it to test the protection of batteries. Simply connect the positive terminal of the battery to the negative terminal of the tester, then turn the power switch on. Then, start charging the battery. Once the battery reaches 100%, disconnect the charger and measure the voltage across the terminals. If the voltage is below 1V, the battery is not protected.

Testing with a LiPo Charger.

You can also test the protection of a battery using a LiPo charger. To do so, simply charge the battery until it reaches 100%. Then, remove the battery and place it into the charger. Turn the charger on and wait for the battery to reach 100% again. If the voltage drops below 1V, the protection circuit has failed.

Conclusion.

This concludes my series on testing batteries. Hopefully, you learned something new!