Justin Beard
Junior Member
I was looking to buy a couple of 2200 mha 3s batteries for my electrohub. What is a good discharge number for it?
Question about 2200 mha 3s battery for Electrohub
- Thread starter Justin Beard
- Start date
Crash_Expert
Aerial Photographer
30C
Anything above 30C is false advertising.
There are SOME companies that have real ratings above 30C but they are higher-end lipos and are not much better than 30C.
C_E
Anything above 30C is false advertising.
There are SOME companies that have real ratings above 30C but they are higher-end lipos and are not much better than 30C.
C_E
Crash_Expert
Aerial Photographer
I can believe that a 5000mah battery with a 60c rating is bogus, the connector alone can't handle that kind of amp draw. So I'm sure there is a 'amp' limit with the connectors, solder joints, and wires but that won't always translate to a 'c' limit.
If the 30c limit is true then I would have ruined my batteries long ago, that's not the most scientific answer but I'm not sure what other conclusion to draw.
With that being said, sure I'd love to see some proof.
If the 30c limit is true then I would have ruined my batteries long ago, that's not the most scientific answer but I'm not sure what other conclusion to draw.
With that being said, sure I'd love to see some proof.
Crash_Expert
Aerial Photographer
I'll start off with this:
http://www.rchelination.com/rchn-v-2-0-ep127-progressive-rc-house/
It's a podcast and they interviewed David Grey from Progressive RC.
He talked about chargers and such but also discussed C ratings.
There's no denying he knows what he's talking about.
It's definitely worth a listen.
Some parts of the show may not be suitable for young ones so just a heads up.
C_E
http://www.rchelination.com/rchn-v-2-0-ep127-progressive-rc-house/
It's a podcast and they interviewed David Grey from Progressive RC.
He talked about chargers and such but also discussed C ratings.
There's no denying he knows what he's talking about.
It's definitely worth a listen.
Some parts of the show may not be suitable for young ones so just a heads up.
C_E
Justin Beard
Junior Member
So something with 30c would be good?
Yeah should work great!
Thanks I'll take a look.
Crash_Expert
Aerial Photographer
I apologize for somewhat derailing your thread but yes, 30C would be perfect.
C_E
A 2200 mAh battery at 30C will allow pulling 66 amps without excessive voltage drop. The Sunnysky 980 kv motor is similar to the motors specced by Flite Test for the ElectroHub quad, and I choose it for comparison because it is widely tested and documented. With a 9x4.7 prop (Flite Test recommends 9x4.5--almost the same) it pulls just under 10 amps at WOT, for a total of 40 amps pulled from the battery at WOT. 40 amps from a 2200 mAh is equivalent to 18C. The 30C battery should be more than adequate.
stay-fun
Helicopter addict
That podcast is awesome dude! I'm hooked! And I really learned a lot!
(it also helps that they're talking about helis
)
