is 20c enough?

[idaho]

Are 20C 3s lipo's enough for a tekin roc412 2300kv and mmp combo? It's going in my bouncer so it will be getting hammered on and I don't want to tax the batteries to hard.

[Meatwad]

Depends on the capacity. For instance a 5000mah20c pack would give you 100amps to play with whereas an 800mah20c gives you 16amps. The roc motors aren't quite as amp hungry as the pro4's, or so I hear. But it'll need more than 16amp

[Crunchymetal]

I've never managed to hurt a cheap 5000 mah 20c lipo in any of my crawlers weather they are heavy or sporty. I agree with Meatwad.

[Calderwood]

Originally Posted by Meatwad

Depends on the capacity. For instance a 5000mah20c pack would give you 100amps to play with whereas an 800mah20c gives you 16amps. The roc motors aren't quite as amp hungry as the pro4's, or so I hear. But it'll need more than 16amp

This x2.

I will add that 20c batteries can usually only be charged at 1c. I charge my 45c and 65c packs at up to 5c. So that's another factor to consider.

[idaho]

They are 2100mah 20c 3s batteries

[dentonmac]

Originally Posted by idaho

Are 20C 3s lipo's enough for a tekin roc412 2300kv and mmp combo? It's going in my bouncer so it will be getting hammered on and I don't want to tax the batteries to hard.

IMO that is a drool worthy combo - especially for a bouncer, but hungry. I think that the 20C will be really pushed with that setup. It will be better because it is 3s, but I would try and stick closer to 30C and up (and especially if it is hammered, like bouncers should be).

I just recently switched from 30C to 45C (same mah and cells) and BOY can I tell a difference. There is so much more punch, and seems to have smoother low speed resolution. It just felt like it came alive, almost like I had put in a 4s rather than my normal 3s.

There will be others that can give you a more technical answer with lots of numbers, but I always live by the more Cs the better (of course, with in reason).

[idaho]

Originally Posted by Calderwood

This x2.

I will add that 20c batteries can usually only be charged at 1c. I charge my 45c and 65c packs at up to 5c. So that's another factor to consider.

My charger doesn't give me a charge rate in C's it's got 1amp 2.5amp and 5amp charge rates?

[idaho]

Also this motor and esc combo is mated to a two speed trans and is in a heavy rig, it's a wraith chassis made out of solid 3/16 steel rod, aluminum skid, and Currie wraith axles front and rear so she's not light by any means.

[Calderwood]

Originally Posted by idaho

My charger doesn't give me a charge rate in C's it's got 1amp 2.5amp and 5amp charge rates?

Neither does mine. On your charger with the 2100mah battery that you mentioned 1a would be .48c, 2.5a would be 1.19c, and 5a would be 2.38c

Btw you will probably puff a 2100mah 20c with the roc.

[Meatwad]

Originally Posted by Calderwood

Neither does mine. On your charger with the 2100mah battery that you mentioned 1a would be .48c, 2.5a would be 1.19c, and 5a would be 2.38c

Btw you will probably puff a 2100mah 20c with the roc.

Agreed, a 2100mah20c pack would probably not like the roc so much. If you (the op) has the space, a parallel connector with 2 packs may be able to provide enough amperage. I had to do the same with my mmp/pro4 setup and a pair of 3s2200mah35c packs, just to be safe.

[Lentsnh2012]

I puffed 2 Gens Ace Eco 1300mah 20C 3S batteries with a 35T/MMP in my old Tundra Truggy! So, yes you'll want to bump up the C rating to 40 or higher.

[idaho]

Right on thanks guy, I appreciate the advice, I had a feeling they would be pushed to hard.

[idaho]

Originally Posted by Calderwood

Neither does mine. On your charger with the 2100mah battery that you mentioned 1a would be .48c, 2.5a would be 1.19c, and 5a would be 2.38c

Btw you will probably puff a 2100mah 20c with the roc.

Quick second question for you, is there a formula that you use to figure out these figures? I have a sneaking suspicion I'm charging my 5300mah 70c 2s at to high of a rate.

[Calderwood]

Originally Posted by idaho

Quick second question for you, is there a formula that you use to figure out these figures? I have a sneaking suspicion I'm charging my 5300mah 70c 2s at to high of a rate.

1000 mah = 1 Ah (amp-hour)

The C after the number is current.

So a 5300mah 70c would work out like this: 5.3Ah X 70c = 371 amps

Regarding charging, 5.3Ah X 1c would equal a charge rate of 5.3 amps. 5.3 X 5c would be a charge rate of 26.5 amps. Your battery manufacture will tell you what rate the battery can be charged at.

[idaho]

Any suggestions for a battery ratings for this combo? I am limited on space. I have two places I can mount it;
In this spot I have 140mm long x 66mm wide x just about any height or thickness


This one I have 138mm x 65mm wide x 34mm high/thick

[idaho]

Originally Posted by Calderwood

1000 mah = 1 Ah (amp-hour)

The C after the number is current.

So a 5300mah 70c would work out like this: 5.3Ah X 70c = 371 amps

Regarding charging, 5.3Ah X 1c would equal a charge rate of 5.3 amps. 5.3 X 5c would be a charge rate of 26.5 amps. Your battery manufacture will tell you what rate the battery can be charged at.

Right on thank you sir, you are a scholar and a gentleman.

[monturacer3]

If its going in a rock bouncer, I would put at least a 40c in it, as the motor and esc will be pulling a lot more current from the battery than a brushed system. The 20c will get very warm under a lot of load and will decrease the battery life. I run a 40c 3s and a 25c 3s in my wraith on a 17.5 and it does pretty god at a G6. The 40c never gets warm even under hard loads and the 25c gets pretty warm. So yeah I would recommend at least a 40c for ya bud. Hope this helped!

[Calderwood]

Originally Posted by monturacer3

If its going in a rock bouncer, I would put at least a 40c in it, as the motor and esc will be pulling a lot more current from the battery than a brushed system. The 20c will get very warm under a lot of load and will decrease the battery life. I run a 40c 3s and a 25c 3s in my wraith on a 17.5 and it does pretty god at a G6. The 40c never gets warm even under hard loads and the 25c gets pretty warm. So yeah I would recommend at least a 40c for ya bud. Hope this helped!

Just listing the C tells us nothing without knowing the mah.

A 5000mah 20c can produce more current than a 2000mah 40c.

[monturacer3]

Originally Posted by Calderwood

Just listing the C tells us nothing without knowing the mah.

Whoops forgot to mention that haha. I use 5000 mah in my rigs. Works pretty good. The 25c I use more for crawling, while I use the 40c for Ultra4 style driving. So a 5000 40c should work just fine. High ish amp output and lasts pretty long. It's a Sky Lipo, which are hard to get now. I don't know the exact amp output of batteries yet, but I should read up on it haha.

[seanmnew]

This has been confusing the crap out of me, what is the difference of 20c, 30c, 40c, etc? Can't find a breakdown anywhere