What is the C Rating of a LiPo Battery - RC LiPo Basics

[@payin1971xr7]

La mejor explicación que he visto sobre C ratings, excelente vide....gracias!!!

[@RCexplained]

¡Gracias por el comentario!

[@LoveTheSun]

Best explanation of C ratings I heard so far. Thanks.

[@RCexplained]

Wow, thanks!

[@williamhendricks2078]

Just the question I needed answered! Thanks!

[@VinM817]

Thank you so much. This is the best C rating explanation video by far.

[@RCexplained]

Thank You for your kind words VinM Is KFPS!

[@MangoJim90]

So true! Thanks Ryan!!!)

[@bobbybanks1385]

this dude is the real deal for helping us get into this hobby man im glad i clicked on your link____TEAcher!!!!!!

[@dheerajguleria4884]

So if my Quadcopter motors pull 30amps max then 30*4 + little devices if we take will be = approx 120-125 amps required at full throttle. So i need to provide 160 amps ? Continuously am i right sir?

[@redhawkvlog]

Awesome all questions cleared! Thanks alot

[@RCexplained]

Thank you for the comment. I'm glad it helped!

[@winstonoso5821]

What c rating n mah battery would you recommend for a kaiju 4s,6s, truck? N good run time.?

[@ubreakitirepairit3569]

If you listened to the video then you'd know to work backwards from what the ESC's max draw is and then give 30% head room. Or you could simply check the Kaiju owners manual.

[@Djekebeek]

I have an esc 60A and a motor that they stand max 360Watt 54A at 25c and I have a battery lying which is 7600mah 25C. Will it work and if so, what will happen? Which component will be hot?

[@chrismccoy1553]

How do I find out how many amps my system is pulling ?

[@RCexplained]

Hi Chris. You can measure the current using a watt meter or using an esc that has data logging capability. For rc cars it's easiest using an esc with data logging capability otherwise a data log meter would have to be used.

[@rcmod642]

thanks. I would appreciate it if you could test the performance of the swollen battery vs normal battery.

[@RCexplained]

Hello, The performance of a swollen battery would depend on the internal resistance of the cells inside. If you record the internal resistance of the battery when new compared to when swollen, this will be the difference in performance. A swollen battery can have minor performance loss or significant performance loss.

[@tenncutt]

He's got to be a Navy guy!

[@nickyrc3505]

Pls I would like to know how to Calculate the c rating of a battery.. Am building a battery pack for my Rc airplane using a laptop battery li-ion batteries to be presided,data's given on the battery are 3.7v 2500mah.no C rating on it, so I would like to know how to get the C rating...Please

[@RCexplained]

Place the battery on a charger to get an internal resistance measurement. You can then use this value to calculate heat output of your cells at a certain current draw.

[@louisdesignsandrides1215]

I have the Graphene panther that's rated 75C and 6000mah. I would be at 450A continuous? what if I 2p or 3p run in parallel? does that increase or improve the continuous rating?

[@RCexplained]

yes, then you would be increasing the capacity to 12000 or 18000 and making the same calculation

[@danieldorn2927]

I got a plane with an ESC needing 80 amps, they suggest using 4000mAh with at least 35C, which would be 140 amps. Now what I wanna use is a 7000mAh with 25C, which would be 175 amps. This should work, right? I know its heavier, but I would like a longer flight time.

[@RCexplained]

Hey Daniel, that is correct

[@danieldorn2927]

@@RCexplained Thanks for your reply! Now I just gonna make some room so the batteries fit

[@catmanfpv9213]

Isn't that the esc that doesn't need 80 amps, but the esc can work / provide up to 80 amps?

[@xaviertaylor759]

How do you find out what power your motor actually pulls or pulled at load? So I have a 120amp ESC, a 3710kv, Io 4.5a, max output 216w and current at max output of 59 amps motor and 8000mah 1s lipo capable of 100c. And my lipo is capable of providing 3.7v at 8amp for 1 hour?

[@RCexplained]

Measure voltage and current with a data logger while running the car.

[@xaviertaylor759]

@@RCexplained Where would one acquire such a thing?

[@RCexplained]

​@@xaviertaylor759 Some ESC's have them built in. You can get a stand alone unit such as the eagle tree elogger v4.

[@piposito150]

yes you describe the maximum current that a battery can provide but what about the time? I'm mean the battery can give you +300A but for how long in this case

[@RCexplained]

The focus in this video was the maximum continuous current. The battery will sustain this for the duration of its capacity. This is what we define as continuous. Peak current that the battery outputs really doesn't help you select a battery. What makes you interested in the peak output of the battery pack?

[@piposito150]

@@RCexplained knowing how much time will it last in the air. I found a formula that seems pretty accurate just divide de battery capacity (Ah) between the amps demanded (A) will give you the time in hours x 60 and you get the time in minutes that you can sustain your quadcopter in the air. for my case

[@RCexplained]

@@piposito150 there's a similar calculator on the radiocontrolinfo.com website under general calculators.

[@bobbybanks1385]

so my esc burned out cause i held go to long 4000 mah 11.1 30c pluged in a 120 amp esc on go past the contin current the esc can take for to long or am i wrong teacher if u can understand what im trying to explain here????please elabo

[@RCexplained]

Hi Bobby, the ESC typically fails when the FETs get too hot from pushing too much current through them. Or when the Caps fail due to excessive ripple voltage. Checking the temperature in these areas of the ESC will tell you if the ESC is being pushed to the limits. Keep the ESC within temp specs and you should be good.

[@jatnikadarkun3129]

Hi Ryan, are these c rating correlated with flight time? I assume the higher c rating, the longer you can fly your drone

[@RCexplained]

No, C rating does not directly impact run time. mAh is related to run time.

[@jatnikadarkun3129]

​@@RCexplained thanks for your fast respond, but I don't understand what does you mean with "does not directly impact run time"

[@RCexplained]

Using a 60C battery vs a 30C battery will not increase your run time.

[@jatnikadarkun3129]

@@RCexplained allright, thanks mas bro

[@joncheung1550]

Love your videos! have a 2300kv motor and a 40 amp ESC. The battery I wish to purchase is 1000mAH and has a C rating of 20. The voltage is 11.4V. I have calculated the continuous discharge is 20A. Will this work with the 40 amp ESC?

[@RCexplained]

Hi Jon, How much power are you going to be drawing from the 2300kv motor? If your ESC is rated for 40A, my recommendation is to get a battery that can atleast comfortably dump 40A. Your battery will be pushed hard if you load your motor to half the rating of the ESC.

[@joncheung1550]

@@RCexplained Thank you for your swift response, I'm not sure as it doesn't say much on the spec sheet, here is the link: shopee.vn/A2217-KV2300KV-Brushless-Motor-40A-ESC-SG90-9G-Micro-Servo-6035-Propeller-for-RC-Fixed-Wing-Plane-Helicopter-i.175760528.6338162255, for the battery: www.amazon.co.uk/FCONEGY-11-1V-1200mAh-Battery-Airsoft/dp/B07PDM6ZGP/ref=sr_1_1_sspa?dchild=1&keywords=1000mah+deans+3s+lipo&qid=1595197272&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyNkcyT0FHSjhTNUpMJmVuY3J5cHRlZElkPUEwMjcxNzI5MklMNDNaUjlCRzBZWCZlbmNyeXB0ZWRBZElkPUEwMDI2NTMyM1MwMFdBS0hIWkc5NiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU= I have calculated the total weight to be under 300g. My other option is that I have recently bought a 30A ESC-not sure if this will work on the 2300kv motor.

[@RCexplained]

Install the motor and do a power test on the bench to determine how much power you will pull.

[@joncheung1550]

@@RCexplained Ok thanks a lot! Does it actually matter how many amps ESC I use? As therefore I can use the 20A continuous current from the battery.

[@RCexplained]

Yes it would since it's all dependent on what your your motor will draw based on the load that it must withstand. If you put a large prop on the motor, it could need 60A to turn it at the RPM it's spec'd at. If the motor, esc and battery were rated between 20-40A, they would all be significantly at risk of failure. If your system is only going to pull 10A then you are good with a 20A continuous rated battery and 40A esc. You need to start at the load placed on the motor. If the load is going to demand 40A, your motor must be capable of that or preferably more. Next your esc must be rated for 40A or preferably more to be able to supply the demand of the motor. And lastly the continuous current rating of the battery must be more than the 40A and preferably more.

[@lucaa482]

Does the c rating change the speed?

[@RCexplained]

Usually a very small bump in top speed as well as acceleration. The biggest difference is it can improve reliability of your ESC. Check out the videos talking about ripple voltage.

[@lucaa482]

@@RCexplained thanks for the quick response. I have another question. I want to run 4s on my car. Is it possible to use 2 times 2s lipo? But one of them is 2200mah and the other one is 3200. And the c rate is different. But they are both 2s

[@RCexplained]

@@lucaa482 I would not recommend running 2 batteries in series that differ in capacity and c rating. That would be asking for trouble.

[@tinocos9632]

So if i put 2 30C lipos in parallel i would get 60C?

[@RCexplained]

The c rating of the battery does not change no matter how you wire the battery pack.

[@nolacross704]

You can pull more amps

[@krystelgale2250]

Hello, im using 2 pcs of 3s Vant Lipo 45c-90c and my top speed is 102kph. Im still waiting for my new battery 2 pcs 3s Turnigy 60c-120 will my top speed will go up?

[@RCexplained]

If the higher C rated batteries can hold a higher average voltage under load, theoretically speed must increase. This is only true if all else in your setup remains unchanged.

[@krystelgale2250]

RCexplained yes only battery gonna change the spur and pinion still the same as i run i hit 102kph. How much more speed i get sir? Do you have a estimate? Thanj you for the reply sir

[@danieldorn2927]

@@krystelgale2250 Doesnt this also depend on the electric motors being rated for higher amps?

[@gaffle-411]

At 2:15... 325 amps CONTINUOUS over those tiny 10ga. wires? Yeah right... 😆

[@RCexplained]

kzbin.info/www/bejne/fKe9doGMgbaAqpY

[@dalelc43]

HELLO RYAN, WHY ARE WE YELLING?

[@Kkidzz]

Post roommate argument syndrome.