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# How to test the voltage of the battery?

_We have a detailed video on how to test the voltage of the battery and charger:_
_https://www.youtube.com/watch?v=MUu-9tsvSQA_

This article is dedicated to showing how to test the voltage of the battery by using a voltmeter.

When you have encountered the following situation, we might need you to test the battery's voltage for us to identify the problem:
-Battery cannot be charged.
-Range is reducing.
-Battery life is reducing.

**Prepare:**

To test your e-bike battery, the only tool you’ll need is called a multimeter.
A multimeter is a simple electrical measuring instrument that’s cheap and easy to get. You can find them on Amazon.


![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/51ka6wpfhwlacul320_1ytvi9a.jpg)


**Execute:**

1. Turn on your multimeter and set it to DC Mode (200VDC)


![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/4664ae4d-f180-4333-803f-61d13b_t7ly21.png)


2. Put the negative probe (the black one) on the battery charging port 1 and put the positive probe (the red one) on battery charging port 3 (see picture) 


![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/xf1f6xub83xuxpboz7rrkegnhygo4d_jd36or.png)


![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/dingtalk20220719205904_j3ftm.jpg)


3. See reading on the multimeter, if the battery's voltage is 48-54V, then it is normal, if not, the charging port might not be working.

4. Check the voltage of the connector on the battery, if the battery's voltage is 40-54V, then the battery is normal, if not, the battery might not be working. 

![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/dingtalk20220815190352_1gqgwyx.jpg)

5. If the voltage of the battery is normal, please test the voltage of the charger, as in this case the charger might have an issue:

![](https://storage.crisp.chat/users/helpdesk/website/f647b0a9af965000/image_12zty9a.png)