LiPo Battery C Rating Confusion

by Charles
(Nottingham, England)

Hi - firstly may I say that I've found the information on your web site the most comprehensive and understandable that I've found on the web.

I'm new to RC modelling although I have a background in electronics. I'm starting from scratch to look at a model hovercraft, the SRN1 - the first ever. I'm trying to understand about motor selection and all that goes with it.

Obviously articles are geared to aeroplanes and not hovercraft - but that's what I'm researching at the moment.

Anyway, my question - in the article about LiPos there's the following paragraph -

""
For example, this 2200mah LiPo battery pack with a 30C rating can safely provide 30 x 2200mah = 66,000 mA or 66 amps.
""

Sorry, I can't see where the "C" figure fits in here. The figure 2200mah is the capacity of the battery, i.e. 2200 milliAmps / hour. It would supply 2200 milliAmps for an hour or 1100 milliAmps for 2 hours, etc.

I can't see that multiplying the capacity, in units of mah, would give a result measured in Amps. What unit is the "C" figure?

Sorry if this sounds a bit confused, any comment/assistance would be very much appreciated. thank you.

Comments for LiPo Battery C Rating Confusion

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
C Rating Units
by: Matt

Hi Charles,

I think you may be over thinking what "C Rating" really means.

Simply put the "C rating" is a number that helps you to determine the maximum sustained current you can draw from a particular battery without causing any damage to the battery.


I never really thought of "C rating" as having units. If it were to have units I suppose it would be 1/time or 1/h in this case.

I hope this helps...

Rating
starstarstarstarstar
Thanks
by: Charles

Hi Matt - thanks, that sorts it for me. Perhaps I'm looking for too many problems.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to RC Plane Forum.

Like this page?

Site Search