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09-12-2015 02:45 PM  3 years agoPost 1


Belmont , Oh USA

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I have a 3S 11.1V 450MAH battery. It has on the battery "3C Maximum charge rate ". Does that mean 3amps, that seems kind of high, I've been charging it at .3 amps .

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09-12-2015 03:26 PM  3 years agoPost 2


Trenton, Mi

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The max charge rate of 3c would mean that that pack (3s 450mah) can be charged at 1.35 amps.

1C - .45 amp
2C - .90 amp
3C - 1.35 amp

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09-12-2015 05:30 PM  3 years agoPost 3

rrKey Veteran

Buckley WA

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I charge a 2 c to get a faster charge and still get good battery life. Dont forget to follow the 80% rule on discharge. Dont take out more than 80% of the rated mah for long battery life.

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10-13-2015 06:18 PM  3 years agoPost 4

rrKey Veteran

Morgan Hill, CA. USA

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As you can see, the term "C rating" relates to the battery's mAh Capacity (FYI: mAh = "milliampere-hour" )

For a 450mAh battery, "1C" = 450mAh.
That means you could pull 450mA out of this fully charged battery for 1 hour and then it is dead.

For charging, "1C" means you could charge this battery from dead to 100% in 1 hour.

If you had a battery with a 3300mAh rating, "1C" = 3300mAh

Charging at 3C safely relates to the internal formula used for the lithium polymer (LiPo) material.
The higher the quality of the lithium polymer, the more it costs and the faster you can charge & discharge the battery.

Your battery's label says you can charge at 3C.
That is more like "Never exceed 3C charge rate"
And, charging at 3C will most likely shorten the life of the battery.

But, if you do charge your 450mAh battery at 3C (1350mAh), make sure you check to see if the battery is heating up while it is charging and you use a good quality charger with a built-in cell balancer.

I would also suggest charging at less than 2C

Charging at 300mA (.3 amps) is about 0.6C and that will take more than 1 hour to charge that battery.

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10-13-2015 07:28 PM  3 years agoPost 5

rrElite Veteran

Ottawa, Ontario

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You can safely charge any lipo @ 1c for every 10C output

If you have a 20C battery you can safely charge it at 2c max

The batteries C rating is related to it resistance. the higher the C rating the lower the resistance.
the c rating is also related to the time it takes to discharge or recharge. The higher the number the quicker you can make the battery go through a cycle.

The speed at which you go through a cycle does not affect it's life as much , If kept with in operating specs.

what does affect battery life is bringing the battery to the limits of it's cycle. 20% and 100% are the max limits and reaching those limits frequently will hurt it.
Operating the battery outside of it specs, like using a 30C when a 45C is required.
It is best to operate at 30% and 95% for longevity and storing at 50% of capacity will ensure you get max cycles.

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