What c rating pacs are people using?

[jamespl]

I am currently using 2x2s turnigy 5000mah 40c they work fine but they get pretty warm, warmer than I have had on any of my other boats plus I'm using ec5 connectors and they get quite warm. The ecs is barely warm to the touch though so I was wondering what c rating everyone is using? I have some 25c 5800mah 2s batteries that I would like to use but I'm not sure they would hold up.

[mm123521]

I got 30 C zippys --- not so good
I got 40 C turnigys -- better
I have 30 C GensAce - Kick Ace Good!!!

All are 5000 Mah, except GensAce is 5300 Mah

I will never fool with zippys again. They run 10 MPH slower, come back hot and puffy.
GensAce out preforms all, they come back cooler, and GPS out a few more MPH faster.

My boat runs them hard.
twin, 34 inch, Aeromarine Sprintcat.
Two CC 1520 motors, T180 ESC,s
447 props
Running 6S, 5000Mah 1P on each motor.
The boat runs 70+ MPH

Motors come back warm
ESC's run quite warm, but not hot.

I highly recomend GensAce from HobbyPartz.

Mark

[Markhpnc]

So why in the world does the manual state 25C???

I'm running Thunder Power 5400 35C and they get warm (I'm thinking 120 might even be too warm?)

I originally bought some Hyperion 5400 35C but they were just a little too long to lay flat so I switched to 5000 25C but haven't tried these yet. I've always had good performance with Hyperion but I'm a little worried about the 25C now and it was $100 for the pair!

[v-spec]

The 25c 5000 mah lipo's should be fine if they are good quality packs like Hyperion. They should handle 125 amps continuous if I'm doing the math right. 120 degrees for the packs is fine as well.

[CHIEFY_44]

i was using nano tech 45-90c worked good for me but i have just got some thunder powers and i'm expecting a big improvement as these are 65c

[jamespl]

I checked the manual yesterday to see if it stated 25c and it does so I gave my turnigy 5800mah 25c a go for 5 mins and they seemed fine so will give them a whirl

[Markhpnc]

Just came in from a run at mostly full throttle with the 2 x 5400 35C Thunder Powers and 5 minutes or so afterwards getting temps from 125 to almost 140 depending on the area.

Edit: and to answer my own question I did some research and according to Thunder Power 160 is the MAX temp and it looks like a lot of heli guy's packs run in the 140 to 160 range for hard 3D.

I quit looking at cheap packs like those at HobbyKing after learning that Hyperions are excellent quality, usually cheaper than the OEM and name brands PLUS my LHS stocks them at prices as good or better than online. Having said that, I have mostly been running smaller packs <2000mah for my aircraft and as much as these large lipos cost I'm going to start looking at HobbyKing packs again lol!

[v-spec]

Get the Gens Ace 30c from hobbypartz.com they are really nice and balance better than my thunder power 45c and 65c's. Free shipping too I get them next business day here in California.