What does 50C and 25C mean?

[ThatTraxxas]

Hello,
I have never used lipos and will be buying some soon. For example, I have seen the Traxxas xmaxx ones as 25C and aftermarket ones as 50C. What is the difference and is it better to have higher or lower C rating?
Thanks

[Calebs0615]

Its a discharge rate. Say you have a 45c battery and an esc that has a rating of 60c. Your battery would be a bottleneck and wouldnt let your esc work to its full potential.

By the way i think for a regular 3 or 4s esc, 60c is a lot. But i could be wrong. Its always better to have more "c" on your battery because your esc will only pull what it needs.

I hope that helped some.

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[RCWilly]

Yes, it is the discharge rate. Generally speaking, the higher the better, but once you clear the max amperage the ESC needs, higher C ratings don't do much more. The discharge rate also depends on the capacity (mah) of the battery, and the larger the capacity, the higher the discharge rate. To calculate the discharge rate (amps), multiply the C-rating by the amp-hour of the battery:
C-rate x mah/1000 = amps

For example, a 25C 5800mah LiPo has 25C x 5.8ah = 145 amps; a 50C 5000mah LiPo has 50C x 5ah = 250 amps

To determine whether the discharge rate of the battery is sufficient for your ESC, first, check the ESC's continuous current. The discharge rate of the battery should be 20% to 30% higher than the continuous current of the ESC (acts as a buffer).

For example, the Hobbywing Max10 SCT ESC has a continuous current of 120 amps, and you are planning on using a 25C 5800mah LiPo. The discharge rate of the LiPo is 145 amps (calculated above), so 145/120 is roughly 1.21, or about 21% higher. 21% clears the 20% the battery won't be limiting the ESC in terms of current supply.

Note: Voltage does not affect the discharge rate, so 2s, 3s, or any cell LiPos with the same capacity and C-rating have the same discharge rate.

[ThatTraxxas]

Thank you so much! Are Venom batteries good? They are cheap but cheap stuff can be trash so idk.

[TwinTurboV8]

Thank you so much! Are Venom batteries good? They are cheap but cheap stuff can be trash so idk.

Venom batteries are very good. I run 1300 mAh Venom 3 cells with a 20C discharge in my MERV and they work great.


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[RCWilly]

Thank you so much! Are Venom batteries good? They are cheap but cheap stuff can be trash so idk.

I have only had experience with Traxxas LiPos, but if I were to get more LiPos, I would go with SMC:

https://www.smc-racing.com/index.php...product_id=619

https://www.smc-racing.com/index.php...product_id=620

[ThatTraxxas]

Venom batteries are very good. I run 1300 mAh Venom 3 cells with a 20C discharge in my MERV and they work great.


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Thank you. I don’t think SMCs are available in Canada unfortunately.

[grizzly03]

Thank you. I don’t think SMCs are available in Canada unfortunately.

They are. SMC lists a Canada International Sales Dealer:

Bego Racing
Candiac
Quebec

Email: begoracingrc@gmail.com
Website: http://begoracing.com/shop/

[1SweetV6]

I just got 2 of the SMC's 2S for 20 bucks each, I really like them. They plug right into the trucks and the Traxxas live peak charger.

[ThatTraxxas]

They are. SMC lists a Canada International Sales Dealer:


Email: begoracingrc@gmail.com
Website: http://begoracing.com/shop/

That’s all in French lol. I speak French but not that well... plus it’s prob $100 for shipping
Jesus that got ugly
Fixed it

[emaxx21]

I have only had experience with Traxxas LiPos, but if I were to get more LiPos, I would go with SMC:

https://www.smc-racing.com/index.php...product_id=619

https://www.smc-racing.com/index.php...product_id=620

Same here, been using traxxas Lipo's, When I have to buy more batteries, I'll go with SMC.