**What do mA and mAh stand for?**

**mA** is the unit (mili Ampere) used for the *charging current*, which you can compare to “the speed of charging”. The higher the mA the faster Eneloop batteries will charge. mA is also used for the *discharge* current. Eneloop chargers generally charge between 150 and 1500mA depending on the charger.

**mAh** stands for milli**A**mpere **h**our. This refers to the amount of energy (capacity/charge) that a battery contains. On every Eneloop there is a mAh number written. This is the total capacity the battery *can* contain. A regular white Eneloop AA has a capacity of 1900mAh.

**What is the difference between mA and mAh? And how do they work?**

**So how does it (not) work!**

Let`s take a standard Eneloop with a capacity of 1900mAh. When you have a charger that uses a charge current of 100mA, the battery will be fully charged in 19 hours. 19 **h**ours of 100**mA** = 19*100=1900**mAh***This is a simplified way of looking at it, but not really the way mAh actually works. *

**Why not?**

**It`s the opposite:**

To simplify it, you take a battery with 1900mAh and a device (let`s take a flashlight for example) that uses a low current of 100mA. The battery will take 19 hours to discharge the battery from 1900 till empty. So 19 **h**ours of discharge at 100 mA equals 1900 **mAh**.

**Isn`t that the same? Why can`t you use that with charging instead of discharging?**

Let`s go back to the first example. A battery charger uses a charge current of 100mA. When you charge the battery for 19 hours you will have 1900mAh charged. This is also written on a standard Eneloop, so the 1900mAh of capacity is now inside the battery.**But**

Now you extend the charge time to a total of 25 hours. This would imply that you do 25*100mA which would result in 2500mAh. This is the problem! A 1900mAh battery can only hold 1900 mAh even if you put 2500mA into it.

**Still not sure?**

Try to compare it with a 1-gallon jug. Fill the jug with 1 gallon of water and it`s full. When you continue throwing water into it, it will still only be 1 gallon of water inside the jug. When you empty the jug, only 1 gallon of water would come out. Simple.

*This is a very basic way of looking at it. In real life, the mAh depends on a few more factors, like the discharge current that is being used, the age of the battery (how much it is used), and the (ambient) temperature. *

**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