FlyingMaddLadd

Hi guys i just need to ask some questions
1: What does The C mean on a li-po?
2: Do i need a certain C
3: If i where to get a 3s 2200mah should i get a 20c or a 25/30c
4:Why should i?
5: Does it matter with charging?

Thanks guys for reading, i hope i get some answers soon thanks

flyinwalenda

My Feedback: (5)

That just means it's certified !
No,.....
Actually the "C" stands for........CAPACITY. It's the maximum safe continuous discharge rate of a lipo battery pack. The C rating you need depends on the type of set-up you are running and the required amp draw for the type of flying you do.
For example a 3S 2200ma 20C lipo would be able to draw up to 44 amps continuous discharge from it without doing any damage to the battery
You multiply the C rating by the amp rating. In this case 2200ma equals 2.2amps times the C rating of 20 equals 44amps.
You may also see a burst C rating on some batteries which means you can draw a certain amount of amps for a few seconds without doing damage to the battery.
Most parkflyer type planes can use a 10C or more rating. As the C rating increases so does the size and weight of they battery so you need to keep that in mind too.
Again the C rating you need depends on the type of flying and the planes set-up.
Any good balance charger will safely charge the lipo regardless of its C rating.

FlyingMaddLadd

Ok thank you very much, So it does not matter which one i should get, I have a good Balance Charger 1-6s. Also why do people say The "s" after a Cell? Is it just so it does not get mixed up with the other "C", I appreciate the time you put into helping me

flyinwalenda

My Feedback: (5)

The "S" is used to specify how many lipo cells are in the pack . 3S/2200 would mean a 3 cell 2200 milliamp  pack.
The "C" rating does matter and depends on what type of plane you are flying and it's set-up.  If you choose to low a "C" rating and put the lipo into a plane that draws too many amps at half throttle than the pack can handle , the pack will get very hot , puff-up , and be damaged.

FlyingMaddLadd

Oh Right i get you now I am Running a 2200kv motor on my multiplex easystar glider with a 2250mah 3s,That is an old battery and i need a new one so i am getting new ones, Would a 25c 2200mah 3s be ok for this? thanks

flyinwalenda

My Feedback: (5)

As long as the physical dimensions of the pack allow it to fit into the battery compartment and the weight of the pack is not too much you can put a higher C rated pack into any plane. You won't damage a set-up using a higher C rated pack as the set-up will only draw what it needs to run. So if it ran fine on a  2250ma 15C lipo then using a 2200ma 25C lipo will allow you to run the motor a bit longer .

BarracudaHockey

My Feedback: (11)

S means series. Cells in series add voltage.

P means parallel, cells in parallel add capacity.

So 2 1000mah 3 volt batteries in series would result in a 1000mah 6v pack.
2 1000mah 3 volt batteries in parallel would result in a 2000mah 3v pack

tacx

My Feedback: (1)

You will be fine with that battery.

FlyingMaddLadd

Ok thank you

Rodney

The larger the C rating, the lower the internal impedance of the battery. Since the heat generated inside the battery as it is discharged is a function of current times the internal impedance you can see that the higher the C rating, the less heat that is generated within the cell as well as the lower voltage loss across the cell. Unfortunately, you can not put to much trust in the published C ratings, very often this may be stretching the truth a bit. Also, as a cell ages, the C rating will drop; i.e. the internal resistance increases. In general, it pays to get as high a C rating as you can and still have it fit in the physical constraints your plane has.

Hemikiller

My Feedback: (125)

A good read...

https://sites.google.com/site/tjingu...po-terminology