BT189 LCD Screen Battery Tester Universal Button Cell D N AA AAA 9V Battery Voltage Checker - Black
No power supply required, battery voltage can be quickly measured with the tester
With a clear LCD screen, digital display test results
Suitable for detecting 9V, type 1 battery, type 2 battery, AA, AAA, button cells, etc.
Small size and easy to carry
Instructions:
The 9V battery is directly connected to the two test holes on the side of the tester. Pay attention to the positive and negative poles
For other batteries, please open the test arm at the top of the tester with your hands and snap the battery in. Pay attention to the positive and negative poles