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"C" specifically refers to the discharge capacity, that is the shortest time the battery can be safely completely discharged in quantified in fractions of one hour. Time is measured on a sexagecimal system, in units of 60, so it can be evenly divided 1, 2, 3, 4, 5, or 6 ways evenly. So a 20C battery can be discharged in 3 minutes, where a 30C battery can be discharged in 2 minutes, 60C in a minute flat. That way you can multiply to get the total amperage, a 5Ah, 20C cell can discharge in 3 minutes @ 100A, where a 5Ah 30C can discharge @ 150A in 2 minutes.

This is what I love about youtube.. It teaches me more then all of my years in school.. :D

The way you explain this tedious topic is simply crystal clear and straight forward . Thank you I finally learned it right!

took UKposts forever but it finally recommended me something useful, this is probably the best explaination of Ah, A, Wh and C I've ever come across. Definitely looking at batteries in a much more reasonable way now.

I've been waiting for a long time to hear these terms and processes explained to me. Thanks!

When a 6 minute video from 5 years ago explains batteries better than my school did this entire year

its been more than a week trying to understand these three topics. well you just explained everything in 0.1 h

This could be the best explanation/tutorial I've seen in ages. Another thing, that AA with 2Ah capacity could've been very expensive back in 2014. I barely see rechargeable AAs these days as 18650 is by far, has become the standard size for battery-powered tools.

Great vid, as always. Thanks for the mention!

Great tutorial!

I was looking at power packs and powerstation, and seeing they had nearly identical or only marginally different mah ratings (which is what I thought was their capacity) even though they were immensely different sizes and hundreds of dollars different in price, I was very confused and this video has been extremely helpful

Thank you very much!! A tutorial well explained like no other. Now I know what others couldn’t explain .

The best video about batteries and their units i've seen so far. Congratulations!

Great video! I always wondered if a machine would only take a number of amps it needed, or if you had too many amps if it would fail. now I know thanks to you!

A Masterpiece as always....! Ah has been a mystery for me for years untill now..

Wow! This video is very well done and clarified a lot. Thank you!!

Took electronics in high school now years later been playing with solar and a multimeter. Great content for a refresher!

You've cleared my confusions...thanks.

I was literally just researching this. Thank you so much!

Thank you so much for explaining it so nicely. You’ve answered quite a few things I’ve had on my mind.

this is great. nobody talks about how ampere and amp hours are different, and i was confused for long time until got it by myself.

Totally not an electrical engineer or electrician but stumbled across this and it was very clear! thanks man

what a nice explanation. . this is what i was looking for..

I used to watch you videos back then, man I learn a lot here

I don't usually comment on these types of videos but this was sooo helpful thank you. We were given an assignment with this in it but it wasn't covered in any lectures.

thank you , I've got a circuits midterm in 6 hours and this helped!

awesome video. Good job! I enjoyed every detail explained at an engineer level.

Thanks, your videos are so informative! Keep it up!

Thank you! you answered a lot of my questions

I didn't even listen to it. I read your captions and everything made sense. Nice!

Brilliant video as usual, my brain loved it. So did I.

Very well produced video and accurate information. Bravo!

Great video!! Amp hours had me buggin'..lol. The last type battery you showed, we use those type in drone racing/freestyle and they're used in many RC hobbies. With high performance drones, the c rating is very important to us, the higher the better performance, unfortunately the cost goes up too. With an average race/freestyle drone you can hit speeds up to 70mph+ but there is also a lot of sharp turns, flips and all around changes of directions in seconds, which means the throttle stick is constantly moving. Each of the 4 motors can pull appx 15-20amps, and the speed controller chips that operate them are rated at about 40amps for buffer from bursts. So imagine the energy draw on the battery, from 0 to max and back down again, 30 times or so during a flight. What happens to us when battery starts to get low, at the end of a flight, we notice what we call voltage sag, looking at it on a flight data chart, you'll see throttle input increase, and as the quad starts to gain momentum, the battery can't handle it, and the voltage sags, just for a second or so, but in racing that's an eternity..lol. So the higher c rating of a battery, you get lower resistance and way less voltage sag near the tail end of your flight, sometimes when you need it most trying to race to the finish line.

well taught. appreciate the illustrations. will make me into a smarter and more capable shopper for sure.

Well done tutorial on battery basics. Many are clueless.

Short, clear and informative. That was very good.

Magnificent and easy to understand. Thank you.

GREAT!.. NOW I UNDERSTAND CLEARLY ABOUT BATTERY CAPACITY IN HRS, WHRS AND C RATINGS THANKS BRO

Thanks for this great video, it has helped me to disperse some of my questions.

Best explanation I ever had, really good please keep up good work for us "slow learners"

Excellent tutorial. Same as battery advertised in Wh / V = Ah

Thanks for making this very clear for dummies like me to learn!

I'm so glad you're making videos again. I have a question. Why do rechargeable batteries have mAh ratings on them but non-rechargeable ones do not? Aren't regular chemical batteries also able to deliver a set amount of current in amp hours?

Excellent video. Difficult topic explained in clear and in understandable terms.

Thanks for the excellent tutorial it really saves time

I like to think of the C rating as implicitly in units of per-hour (1/hour or hour^-1), so that a 2C rating means you could (in theory) discharge such a battery twice in one hour (or once in half an hour). This way, you have a calculation such as 2.2 Ah x 20/hour, and the hours obviously cancel out, leaving a measure of current.

Thats very informative.Thankyou for posting in a very "understandable" way.

Amazing explanation! Thanks for sharing! :) Now everything is clear.

Great explanation to calculate battery life and understand C ratings!

Great video! Thanks for clarifying that the units do not actually work out when dealing with C ratings.

Thanks for the video! So great 😍👏 I was looking for this information.

Simple and clear explanation. Thanks!

I Learned so much from you, thanks for that! Things i Never thought i could grasp, now become clear to my aging Brain. Greetings from Germany !

This is great. Thank you.

Great tutorial as always.

Thanks for the video. Immediately clarify the areas I could not understand.

I'm so glad to see your videos popping back up on my feed again. You're always clear, concise, and fun with your explanations. Keep up the stellar work!

great demonstration. i think im startin to get it now..

Your videos are awesome. Could you please make a video explaining what it means for a electrical component to draw too much current?

thank you for this fantastic video!

Nicely done, Professor. :)

Thanks for the valuable information you provided. Can you explain what does​ the "initial current less than 60A" written on the side of a Gel 200Ah battery mean?

That certainly cleared up a few things, I've been curious as to what the amp hours thingy on batteries actually meant. Had to watch some of this a few times before I got it.

nicely done the explanation.

u really rocked it bro.....it is very easy to understand by way u teach...

Thank you so much... I need this tutorial like yesterday 😅

Amazing video, exactly what I was looking for.

thanks about the explanation, Finally I know about C rate and relation to Amper Hours. The video have helped me understand my problem

Perfect! Clear and to the point.

Amazing explanation thank you

We need more videos on batteries like this!

Excellent as always.

Hello, thanks for this awesome learning material. This is really helpful for query regarding Amph

Can you do a video about how you acquired your knowledge (education, career, etc)? I'm taking electrician classes right now so I'm curious. Also, your videos are awesome.

I'm currently testing my surprisingly large collection of AA and AAA batteries with a RS232 logging multimeter and 3.2 ohm load. This makes about 200 ma current draw. I'm logging the data to a computer and working out the total amp-hour capacity of the batteries to estimate their overall maximum charge. Seems to be working pretty good. I'm measuring mA not volts. (If i had arduino or two DMM i'd do both at the same time). Thanks for the vid.

thanks Great Video. keep them coming

Great video and it was really helpful. Thanks

A great tutorial for a beginner. I like the way of explain and I'm gonna like and also subscribe to your channel.

Wow, very informative video, thanks a ton!

Very clarifying video, thank you very much!

I Think that was a beautiful and useful video, thanks a lot for your effort :D

I will have to watch it a couple more times. My head is spinning. Good instruction. If I were smarter I could say you made it easier to understand

Very well explained

love your videos so helpful

Good voice, clearly speech and very good videos.

great explanation now I understand how this works and what's the difference in between

If I'm using a Li-ion battery with a limit of 4 A, feeding a circuit with a duty cycle of 80% consuming an average of 3.5 A, is the battery going to behave as if it's consuming 4.4 A and therefore opening the circuit? Would a buck converter fix this? If I manage to increase the frequency of the PWM, can I trick the current monitor by having an on-time smaller than its over-current detection delay time? Thanks for all your videos, you're amazing!

I've always been so confused by batteries, especially in terms of voltage and current. Thank you for explaining this!

This taught me more that my school ever can. Im defnitely wathing your vids and subbing. Dont know if you already make videos on normal electronics and electric topics in physics for school, if not you should cause you'd make a great teacher :P

Just learned more in 6 minutes than in 3 years of high school Electronics class. Subbed.

No.. Thank you for Making & uploading this video and many others 👍👍

Very informative, interesting video. Thanks for sharing! (subscribed)

I love your vids man keep the good stuff coming but pls make a video about winding transformers I really want to know because I want to make a dual rail + and - 25 volts for my audio amp

Awesome explanation

Thank you very helpful, by the way are you the voice of 'Talky the toaster' from Red Dwarf TV show?

Really easy to understand vid. Cheers

Thanks for the information!

Very useful information. Thank You.

Great video. I'd like to have seen a little more mention of the hazard of over discharging some batteries. Venting a Li-Po is bad lol.