25C Vs. 30C?

[boogaloo_d]

Is there that big of a difference between a 25C lipo and a 30C lipo with the same voltage and mAh?

[Himalaya]

No. unless you are beating your batt to its very limit, you can hardly feel too much difference.

Actually many of those 25C and 30C are same formula same material same process from a same production line. the only difference is when filtering, a cell reads say 2.1 mΩ is labeled 25C another that reads 2.0mΩ becomes a premium 30C......

[hydromaddicted]

25c 5000mah 125amps continuous 225 burst
30c 5000mah 150amps continuous 300 burst

[line6]

YES, get the most C rating you can afford. the difference between a 25c and 30c is visually noticeable even in a ul1 type power system. get 35c if you can. the higher the C the less you are working your lipo's my 35c come in at around 100

Jason.

[boogaloo_d]

Thanks for the info. I'm building my first FE. Its a P-Spec tunnel. I will be running the ESC and motor from a UL-1. I've been told to run a 4s 5000mAh 30C battery. I'm just wanting to make sure that is not going to over load the 60amp ESC.

[Doby]

Is there that big of a difference between a 25C lipo and a 30C lipo with the same voltage and mAh?

Yes,,,5C:rofl::rofl::rofl:

[Jeepers]

the difference between a 25c and 30c is visually noticeable even in a ul1 type power system..

depending on the quality of the battery.

[Rumdog]

It is especially important if you're running 1p.

[line6]

maybe i should have wrote it a bit more clear. I was trying to say same brand, same mah, same voltage. in my experience the higher the better

[JimClark]

I would think it really depends on your amp draw in general the higher the better is true but there is overkill if someone buy's 30 or 40 C batteries and puts them in a spec LSH or Tunnel hull only drawing say 60 amps

[Steven Vaccaro]

I agree with the amp draw theory. I've used diff c rating on my boats and had similar results. But I prop most of my boats to get more runtime and less speed.

[D. Newland]

If I had a choice between a 25C and a 35C cell of the same brand and the 30C cell was only a few bucks more, I'd take the 30 C every time.

The rule of thumb is that the higher C rated cell will maintain a higher voltage under load, even at P-Limited power levels. The cell doesn't work as hard, doesn't get as hot and lasts longer.

[NativePaul]

What D. Newland said, I race my cats in to Naviga hydro rules which are 5 minutes in duration with 10 second mill and an in lap so try for 5 and a half minutes run time which on 5000mAh is under 60A or 10C, but while some may consider it overkill I am not still using my ancient 10C packs, each time a new C rating comes out if I can afford to I upgrade my cells, I am currently on 30C and 35C cells as the higher C rated cells have lower internal resistance and higher voltage under load which means that although nominally the batteries hold the same amount of energy I get more RPMs from the higher C packs, although sometimes the extra voltage and pulls enough extra amps that I have to cut the prop or even prop down to maintain run time, the difference between 15C and 20C was a particularly big jump but there has been an improvement each time and I recommend buying the highest C rated batteries you can afford however many amps you are pulling.

[Simon.O.]

30C over the 25C for a given brand.
I have some good Zippy and Turnigy packs. The difference in those brands is better wire for a start and then there is a noticeable difference on the water too.

I will qualify this by saying that most of my setups are close to saw types and I push things.......hard.

For a dollar or two more, get the 30C. It is worth it. :thumbup1: