Detecting anything higher than that should alarm you. One of the most obvious signs of a bad lithium-ion battery is experiencing overheating.Īgain, check the specs of the battery and see its normal operating temperature. If you see that the numbers are more than the manufacturer’s provided value, you will have to assume that it has gone bad. Measure the charge capacity before and after disconnecting.
Leave the battery disconnected from the device for a couple of hours. Lithium-ion batteries in good condition usually don’t self-discharge quickly. What I mean is that the charge gets decreased automatically even when the battery is not working to power up a device. Like the previous point, I have to tell you that all batteries self-discharge. Those who are in a hurry to know the current state must use a multimeter. After downgrading to 3.4V, you will notice that the device is not running.Īnd, reaching 3.0V means that it is practically dead.
After a certain level, the cutoff circuitry disconnects it automatically.įor example, a 4.2V lithium-ion battery can go to a 3.7V state after a certain time. Over time, all batteries start losing the voltage. And, relying on self-discharging techniques will even take longer. If you are not using a tester, it will take several hours to confirm this symptom. What I mean is that your lithium-ion battery won’t be powering the device as long as it used to be. One of the most common and first signs of a bad battery is noticing reduced capacity. Or, a slight deviation in the value does not mean that it has gone bad.īesides this inspection method, there are several easier ways to tell whether there is something wrong or not. Once you have confirmed that the results shown by the meter match the original specs, you can consider it in good condition. I have described the steps to test it below. It can show battery capacity percentage level precisely which normal meters can’t. įor performance or capacity testing, you can use the multimeter I have suggested. Here, you can use Universal Battery Checker Tester with Leads LCD Display. The best way to find out is by knowing the manufacturer of the lithium-ion battery and the specs of that battery model.Īfter that, measure the voltage, resistance, and performance by using a multimeter.
Lithium battery tester how to#
3 Conclusion How to Tell If A Lithium-Ion Battery Is Bad?īefore you start testing the battery, you should know what the particular model is supposed to behave.
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