Jump to content
Sign in to follow this  
dryan

Battery Tester

Recommended Posts

I have a voltmeter (multimeter); how can I use this to test AA and AAA batteries?

If I am correct, simply touching the leads of the voltmeter to the contacts of the battery would almost always give me a reading of 1.5 volts.

I think by adding a resistor, I can get a correct reading. How do I calculate what value resistor I need?

Share this post


Link to post
Share on other sites

You would probably get a better reading using the amp meter. As long as you do it for brief periods you shouldn’t need a resistor for AA and AAA batteries.

Share this post


Link to post
Share on other sites
I have a voltmeter (multimeter); how can I use this to test AA and AAA batteries?

If I am correct' date=' simply touching the leads of the voltmeter to the contacts of the battery would almost always give me a reading of 1.5 volts.

I think by adding a resistor, I can get a correct reading. How do I calculate what value resistor I need?[/quote']

 

Doesn't really matter much. Once the battery is under load, the voltage drop across the resistor is the output of the battery (assuming it's just the resistor in series with the battery). If the R is really large the reading might not be as accurate.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.