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Old Jun 11, 2012, 03:44 AM
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United States, CA, San Jose
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3S 11.1V 2200mAh 30C Battery

Greetings all,

Quick question; I have an e-flite 3S 11.1V 2200mAh 30C battery. What does the 30C stand for? I see the same battery by e-flite with a 50C and it cost a bit more. Whats the difference?

Thank you!

Bob
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Old Jun 11, 2012, 06:20 AM
A man with too many toys
United States
Joined Feb 2001
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The C rating is the maximum discharge rating. 30 C means that the maximum current is 30 times the capacity. 2.2 amp hour times 30C is 66 amps. A 50C 2200 is designed for 110 amps.

Advantage of higher C is that the internal resistance is lower and it has heavier wires and sometimes a larger connector to handle the higher current. They also hold voltage better under load.

The disadvantage is higher C is that they are more expensive, usually heavier and sometimes a little larger so check the dimensions before you order.

.
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Old Jun 11, 2012, 06:26 PM
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Also, before you go and spend more $ thinking "Bigger is better" know that most manufacturers greatly overestimate the C rating of the packs they sell, especially when you start getting up to 50C and higher packs.
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Old Jun 12, 2012, 01:19 AM
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Keep in mind that the c rating is what the battery is capable of delivering for a very short time, a 30c 2200mah battery wont typically handle more then 30amps continuously.
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Old Jun 12, 2012, 06:10 AM
A man with too many toys
United States
Joined Feb 2001
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Quote:
Originally Posted by djacobox372 View Post
Keep in mind that the c rating is what the battery is capable of delivering for a very short time, a 30c 2200mah battery wont typically handle more then 30amps continuously.
Most batteries now days have a two number like 30c/40c. That indicates that the battery can sustain a continuous discharge or 30c until itís empty with short bursts to 40c. If a manufacturer only states one number that is suppose to be the continuous discharge rating but some are not very truthful in that number.


If you do try to run very high amperage make sure that your ESC and motor are up to the task.


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Old Jun 13, 2012, 10:58 AM
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United States, CA, San Jose
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Got it! Thank you very much everyone; great information...

I think I am beginning to understand electrics. I certainly am enjoying flying them; so much quicker and less hassle then nitro planes.

Thank you again...
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