# What is battery C rate?

**C** = equal to (full) **c**apacity. 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.

**More questions about charging (Eneloop) batteries**

+ Is slow charging better than fast charging for Eneloops?

+ What do mA and mAh stand for? And what’s the difference?

+ How many times can Eneloop rechargeable batteries be recharged?

+ Do Eneloop batteries need a special charger?

+ How long do Eneloop batteries hold a charge?

+ What is the recommended charge current for Eneloops?

+ What’s the best Eneloop charger?

+ Eneloop Voltage – what’s the deal

+ Can you overcharge Eneloop batteries?

+ What is the maximum charge voltage for Eneloops?

+ Do I need to charge my new Eneloop batteries before I start using them?

+ Should I discharge my Eneloops completely before charging them?

+ How long does it take for Eneloop to charge?

+ How do I need to Refresh my Eneloops?

+ Can I refresh Eneloops if I don’t have a charger with a refresh option?

+ How many years do Eneloops last?

**Advanced Eneloop charging info**

+ What is -dV/dt charging? (termination)

+ What is 0 dV/dt termination?

+ How are Eneloops tested to claim a 2100 cycle life? (IEC 61951/ JIS 8708)

+ Non-charge related questions can be found in the Eneloop FAQ