Testing Batteries With a Multimeter - AA Battery Test

How to test a battery. Learn how to test a battery. How to use a multimeter to test a battery. What happens to the battery voltage under load. How to tell if the battery needs replacing.

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[EngineeringMindset]

⚠️ *These videos take a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕

[libbyd]

It’s great that you just jump right in to the material without some kind of annoying intro like so many others feel the need to do. Thank you!

[aaobukhov]

Thanks! I appreciate that there is no long intro, straight to business and very clear explanation :)

[fortunedecoder]

Direct to the point. Easy to understand easy to learn. This channel is highly recommended for future engineers

[cantubloodaxe]

You know what would be great? A whole section of multimeter instructions. How-to's! I understand there are actual college classes the subject? I would be obsessed with that playlist.
I have this giant Fluke my boss paid $1000 for and I only use, like, five functions.

[DardaniaLion]

My respect for you. I bought this thing to test the batteries and had no idea what to do but this video showed everything I need to know. Many thanks.

[abpa]

Great explanation without bs. I think my meter's battery check mode includes some resistance already.

[EvenTheDogAgrees]

You've told 'em how to measure, but not what they should be measuring. At what threshold voltage would we consider an alkaline battery dead under a 100 ohm load? Having a measurement but not knowing how to interpret it isn't very useful.

[patkevin]

Thanks! I've been having issues with batteries passing a voltage no-load test as being good but the devices they powered not working well. I didn't know that inserting a 100 Ohm resistor method would provide such a different result.

[firstmkb]

I pull the batteries out of lights & such when I put them in storage, in case of corrosion. I end up with a lot of partially used batteries as a result.

If I use the 100 ohm load test described, should anything below 1.5V be recycled? I expect battery requirements will depend on device the device, but I'm looking for a good (not perfect) rule for keeping "good" (used) batteries.

Thanks for posting this!

[ravusursi]

The LoZ function on my Fluke 117 performs a similar function with no need for an added resistor. Great video and very well presented.

[abdulrahmanmohamed]

Thank you very much, Great work. is this work for the re-chargeable batteries too?

[mikechiodetti]

Great way to test it with a light load. It can also be tested under load in the device it's installed if it's accessible, but I like your way for a quick test.

[FantasticOtto]

How would this compare to a consumer battery tester? Can battery testers also show 1.5 v when depleted or do they have that resistor trick built in?

[RichardBronosky]

I've never tested my batteries under load. I feel like I've wasted 40 years. Thank you!

[proamptik]

👍👍👍👍👍👍 great vid for entry level like me... forever there will be entry level people

[garic]

Hi, amazing video and great info! One question: Can you use the multimeter to test for current without the resistor? I mean, is there any buit in function that will act like a load to measure current? I'm using a regular cheap generic multimeter. Thanks

[gaborlukacs]

I checked so much battery but I tought if it is above 1 volt it is still good... thanks E.M.

[Elvis-dwux]

Excellent, cheers from Canada....I had a similar problem...got a new 1.5 V from $ Store...my 1983 Citizen clock is running again...

[donaldp]

I would like to see your take on testing Lithium batteries, to see how it compares to what I've been doing based on advice from 'batteries only' retailers.