What is battery C rate?

C = equal to (full) capacity. If the capacity of the battery is 2000 mAh and you charge at 1C it will be 1* the capacity of 2000= 2000mA. This means the charge will take 1 hour to charge the battery. If you see a .5C it means half of the capacity so in this case the half of 2000 = 1000. So at half the charge rate, it`s taking 2 hours to fill.

Another way to remember it is to say, 0.5C is 0.5 times the capacity. 0.1C is 0.1 times the capacity.

A little help: Try to see 1C as 100% charge current.
0.5C is going to be 50% = 2 hours
0.2C is going to be 20% = 5 hours
0.1C is going to be 10% = 10 hours
0.05C is going to be 5% = 20 hours

The recommended C-rate for Eneloops is .5C to 1C. This means a charge current of 1000-2000mA for normal Eneloop AA batteries.

Eneloop batteries are one of the best rechargeable batteries in the world.
You can buy them in the following countries:

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