Battery Capacity - Amp-Hours, mAh, and Watt-Hours

Thank you so much. I could never explain when my wife asked how much energy I had left. Or when we casually talked about discharge. Now I can!

This video is excellent but in detail. I hope most read comments or some to get an idea to watch. Please watch, but if you are not building something and just trying to grasp the concept weather it is cordless tools, car repair or watch the meter go around, let's start simple.
"Watts" are measured with math but an "Amp" meter. 99% of DIY guys / gals use a digital multimeter or amp clamp. This is "P" for power, he my kids and the "HE Man" toy. So, P over "I" X "E" is PIE. Everyone likes pie except it is Pelosi because it is American. If you measure two of any, you can forgive out the 3rd.
It is the same for "Ohms Law" except no Matt Dillion. E = electromotive potential over "I" = Amps and "R" is resistance" like kissing a cheerleader on a first date. (Note: Yours will vary). But ohms law is E over I X R in a circle. I & R are multiplied while anything under E is divided. Like Mary Ann in your dreams from Gillian's island.
Amp is cool. P=power but measured in amps, so the vacuum you want in your shop is proudly rated at 12 Amps. Sales guy will say this 12 times at least. We know it plugs into the wall so the "E" measured in voltage is 120Vdc. Now, 12 amps divided by 120 volts is 10 ohms of resistance. Strong motor (Some smaller, some bigger) 10 amps is about right! Just don't play with small cats when on. Have a lucky one! DK, ASE Master Tech since 78, mechanic in 70 because I have tools.

Shouldn’t voltage always be represented by the letter E

Thankyou so much it's a very helpful video, and very nice way of teaching

Thank you clearly explained basicss much needed

Thanks for this useful info.
If I have six cells in a battery to be 12 voltage-7.2, Ah and I want to connect a group of batteries in series to achieve 72 voltage so, here, in this case, I need six batteries; my inquiry about the total capacity will be 43.3 Ah or will be 7.2 Ah.
Thanks.

too many damn ads!

A battery with a capacity of 3 amp-hour should be able to continuously supply a current of ...
A. 1 amp to a load for exactly 3 hours
B. 3 amp to a load for exactly 3 hours
C. 3 amp to a load for exactly 2 hours
D. 2 amp to a load for exactly 3 hours

excellent video, concepts clear, thank you

So this is what's thrown me off even after the 16th time I've watched this video you say that time is a measurement of seconds or minutes or hours and there are amp hours okay so the Redbox and circle is amp hours. That makes sense except it can also be measured in seconds or minutes right so is there such a thing as a milliamp seconds or amp seconds or amp minutes or milliamp minutes what about just plain old milliamp hours what would that equal you know I only ask because I come up with these questions nobody ever thinks of. My mind goes well does this exist and that's what I'm asking right now does anything else exist as far as this formula goes am I going to encounter something in the future when I don't have my cell phone to look up anything and need to know what milliamp seconds is, for instance. Because if I don't at least see the formula one time there's no chance I'll get it right even though it's basic conversion trust me that's just what happens, mental illness sucks. Understanding concepts that are very complicated but getting them wrong because you don't know the basic fundamentals really blows.

Excellent video , I am extremly amazed of the simple way you gave details and lots of informations.
I have watched lots and lots of videos but your is one of the most informative . Really good job and thank you so much

does a battery with a rating of 274 Watt Hours become less if it is at say discharged to 10%

thanks1

Simple and best explanation, thank you

Thanks my friend. This video made a lot of things very easy to understand and remember ( liked & subscribed ) :D

Thanks for this informative and
in-depth explanation.
Stay well
Ash from Scotland 🏴󠁧󠁢󠁳󠁣󠁴󠁿

Hi. Thanks! But??? If you have solar panel 12v batteri 100ah. And its connected to inverter 230v AC, how you calculate that? Example how long will last 100ah batteri with invertet to 230v ac if load is 300w. If there is no sun how long will batteri last at 300w?
Thanks.

Excuse me, but organic chemistry is not about electricity. Electricity is a branch of physics.

Nice explanation

Great video! I'm trying to power a 5V sensor with a 3.7v booster/charger pcb. What's the minimum mAh battery you think I should use? I have a 120maH lipo on it now and the board seems to dwindle and looses power 😞. Thanks for your time!

good video.. but ur hand writing is terrible

Thanks a lot! It helps

this guy E=pt
me: no, E=mc square

AA battery contain how many joules ???

Nice explanation. You'll want to get your pronunciation (and possibly your spelling) of coulomb correct for your next video. It's pronounced "KOO-lomm" or 'KOO-lome"

Thank you sir👍

Thanks alot🥰

incredible video with clear examples... thank you :)

Please make a video on battery management system. It will help you so many people.

Electric⚡ energy into thermal energy⚡ into physical energy⚡ into nuclear energy⚡
Comparison???

factorio brought me here

This video cuts straight to the chase... Thanks!!!

superb

I'm a dumb ass 😂

Great video man loved the end too

Thanks, I wanna buy a battery for my Arduino and I have forgotten all these formulas.

Good job man, very informative video

Ah ok, but if i put 10 26680 ion cells with 5000 mah each, ill get 50Ah?

So how do i calculate the charge rate for my battery pack made of gel battery’s a single battery is 12v 72ah

question (on the theory side): if voltage is explained as a pushing force, and current is measured in number of colombs passing in a circuit per second (amps) , then shouldn't an increase in pushing force (voltage) automatically increase current and not just power? in more concrete terms, my question is: if you really measure the number of colombs passing per second at two circuits, one which runs 1A@1V and the second which runs 1A@2V, would it really be the same?

if it's not, then the whole concept of volts and amps is just a convention, but if it is, then it must mean (since power increases while current stayed the same) that power(energy) comes not only from the number and speed in which electrons pass thought the circuit but also from some other factor like perhaps some variable electric charge these electrons carry (if such a thing even exist, i'm just rumbling here) in which case voltage is not just a pushing force but something more then that.. anyway would love to hear your thoughts

thank you so much

calculations are good but, you write it out so complicated jumbled and unnecessarily drawn out! i already know this stuff and it confused me.

Good explanation if I could have stayed awake.

thank you so much, I had been searching for the answer to the question, how long does the battery will discharge. Learnt a lot 🤯 from you.

Ive ended up here because of starting remote photography to decide what power bank to use for various bits of kit. Interesting about mAh

Hello! Can someone help me? What about if you want to know how much a battery can last on a 12v led? For example: how much can a AA battery last on a 12v led bulb?

👌

Am I a nerd because I thought this video was awesome? Thanks for posting.

Following until watt hours then lost me when you started with c... I’m dumb you’re smart.