Can I Use a Charger With the Same Voltage but Different Amperage Rating?

⚜️ Chargers and power supplies come with different Voltage and Amperage ratings. But if you can't find the same, then choosing the right one is important. I'll look at a few of the parameters.

In Short:
For power supplies or chargers:
* The voltage must match.
* The amperage must match or exceed that required by the device.
* The polarity of the connection must be correct.
* The input line voltage (wall or “mains” power) must be supported, but is unrelated to compatibility with the device being charged or powered.


Chapters
0:00 Compatible Chargers
0:30 The question
0:58 The rules
2:41 Voltage
3:55 Amperage
5:37 Polarity
7:18 Input voltage
8:26 Recap

More Ask Leo!

#askleo #Chargers #Voltage

[askleonotenboom]

Volts and amps combine to confuse. Understanding how they work can help clear it up.

[timsmith]

"Amperage is drawn, not pushed." That's the clearest explanation I have ever heard. Thank you!

[TheSlyProfessor]

I am a college music professor looking to teach this subject in class and you explained it perfectly. I’ve been searching for an explanation like this for a long time. Thank you!

[katierose]

6:17 That "center negative" or "center positive" polarity diagram for barrel connectors was so helpful! I looked at the brick part of the adapter and it was right there! In plain sight!! Many thanks!

[abdulbasitdalvi]

A lucid and to the point explanation. Loved it. Keep up the good work.

[michelpapineau]

Thank you for making this! This is exactly what I was looking for. Super helpful and well done.

[tomwatson]

Excellent. Only just seen this video. Very clearly explained, and best explanation I've seen. Can't understand why other videos have to complicate things.

[wilhard]

Well done. My Elmer who coached me for my general license presented voltage and amperage in virtually the same fashion. He has been a silent key for nearly 30 years but listening to you brought back my memories of him. It is odd that something so simple confuses so many people. I now find myself eager to watch more of your videos. 73's

[nathenholzl]

Thanks for your time I've been working in electronics for a long time. And this is the first clarification I've really heard

[morniclegreen]

Thank you! This is exactly what I was looking for. Very helpful

[rushikeshkurhade]

short and simple and elegant explanation, thank you

[dannyschacht]

Thank you for educating me to this question that I've had forever.

[rasmusrge]

Thank you, sir. Simplicity is the ultimate sophistication...!

[javiersidel]

Thanks, man. I learned a lot with this video. You are the best!

[JustOneCalorieNotEvilEnough]

Thank you do much for the refresher. It's been a while since my tinkering days of yore, and I needed to confirm a variable output on a buck box. Since W (P) is drawn, the equations imply that A (I) are drawn as well. But as my grandfather said, measure twice, cut once.

[bernardomacara]

hey thanks leo, i always had this doubt about the amperage, thank you

[squidlad]

Thanks so much for this. Really succinct and easy to understand.

[gershwyndaniels]

I watch a few different IT guys. Each of them are different. But you You really take us to class..

[IndyJay]

This is so helpful and easy to remember! Maybe now I can trim down the pile of various old usb chargers I have lying around too.

[eondiax]

Thank you sir, your explanation is very clear and easy to understand. It really helps.