Kraton Safe battery size?

[L.N.MIKE]

I have the kraton 6s 1/8 scale.
I usually run 2 gens 3s 50c 5000mah lipos.

I have a 4000mah 45c 4s lipo just lying around not sure what brand it is.
I read in the manual not to use anything under 5000 mAh 35c
Should I not use this battery or will I be okay running it don't want to cause any damage to my ESC which is the stocked 185 BLX.

 

[olds97_lss]

The BLX185 manual says the minimum you should use is 35C 5000mah. Which I believe comes out to 175Amps. So if you went smaller capacity, you would have to go higher C. If you had higher capacity, you could run lower C.

The C rating is relative to the capacity of the pack, so 40C may be ok.

Amps = C * capacity in Ah

4000mah = 4 Ah
175/4 = 43.75C

5000mah = 5 Ah
175/5 = 35C

6200mah = 6.2 Ah
175/6.2 = 28.2C

So my 5000mah 50C are capable (in theory) of 250A output continuous.
My 6200mah 50C are capable (again, in theory) of 310A output continuous.

However, when I run the packs back to back, I can really feel that the 6200mah packs perform better overall. I feel better punch out of them in general throughout the run.

At the end of the day, the C rating on a pack is marketing. So even though it says 45C or 100C, that's hitting some number that company measured at some discharge rate they applied over a set of time they applied. I don't think there's a pack out there that can really withstand 50C throughout the entire duration of the charge without melting down. Unless they were designed for military or space exploration.

 

[L.N.MIKE]

The BLX185 manual says the minimum you should use is 35C 5000mah. Which I believe comes out to 175Amps. So if you went smaller capacity, you would have to go higher C. If you had higher capacity, you could run lower C.

The C rating is relative to the capacity of the pack, so 40C may be ok.

Amps = C * capacity in Ah

4000mah = 4 Ah
175/4 = 43.75C

5000mah = 5 Ah
175/5 = 35C

6200mah = 6.2 Ah
175/6.2 = 28.2C

So my 5000mah 50C are capable (in theory) of 250A output continuous.
My 6200mah 50C are capable (again, in theory) of 310A output continuous.

However, when I run the packs back to back, I can really feel that the 6200mah packs perform better overall. I feel better punch out of them in general throughout the run.

At the end of the day, the C rating on a pack is marketing. So even though it says 45C or 100C, that's hitting some number that company measured at some discharge rate they applied over a set of time they applied. I don't think there's a pack out there that can really withstand 50C throughout the entire duration of the charge without melting down. Unless they were designed for military or space exploration.

I'm sorry is there any way you can explain to me how you are getting 250 amps on the 5000mah 50c, that's what I run. So how many amps wood a 45C 4000 mAh be.
Thank you for the help a time I would really like to understand this.

 

[olds97_lss]

I'm sorry is there any way you can explain to me how you are getting 250 amps on the 5000mah 50c, that's what I run. So how many amps wood a 45C 4000 mAh be.
Thank you for the help a time I would really like to understand this.

It's pretty simple math. If we were to believe what is listed on a pack. You take the capacity/1000 and multiply by the C rate.
Capacity in amps * CRate = Amps

So, for your 45C 4000mah (4Ah) pack it would be:
4A * 45C = 180amps