What Is an N Battery and What Is it Used for? (2024)

Understanding N Battery Chemistry
Choosing an N Battery to Meet Your Needs
Frequently Asked Questions

N batteries are small, stocky cylindrical batteries about three-fifths the size of a standard AA battery. They are 30.2 mm long with a diameter of 12.0 mm.

N battery cells come in a variety of chemistries and depending on the brand, you’ll find them with one of the following designations:

E90
LRN
LR1
MN9100
4001
810
KN
UN5
GP910A

N batteries are defined by their size (12 mm width x 30.2 mm length), but they come in a range of electrochemical systems.

The table below shows the different electrochemical systems that N batteries come in.

Feature	Chemistry
Zinc Carbon	Alkaline	NiCd	NiMH
Rechargeable	No	No	Yes	Yes
IEC Label	R1	LR1	KR1	HR1
ANSI Label	910D	910A	n/a	n/a
Capacity (mAh)	300–500	700–1000	200–500	350–700
Voltage (V)	1.5	1.5	1.2	1.2

As you can see, all N batteries operate between 1.2 and 1.5 volts. They also have a capacity of between 200 and 1000 mAh (depending on the battery chemistry).

Zinc-Carbon N Cells

The zinc-carbon N cell uses a zinc anode and manganese oxide for the cathode. The cathode is mixed with carbon to increase the cell’s conductivity and to help it maintain moisture. However, the carbon doesn’t participate in the chemical reactions; only the manganese oxide does.

Zinc-carbon N cells typically have:

A voltage of 1.5 V
A useful life allowing for 110 minutes of continuous use
A shelf life of 1–2 years when stored at room temperature

The cells have a basic structure. The zinc, along with the mixture of carbon and manganese oxide electrodes, are shaped to form a cylinder. This mixture is then dipped into the electrolyte with a carbon rod in the centre. This supports and facilitates the movement of ions.

As a result of this simple structure, the cells offer basic functionality with the shortest lifespan among the N cells.

N-sized zinc-carbon cells work best for devices that don’t use a lot of power, such as

Simple toys
Remote controls
Hand-held calculators

Alkaline N Batteries

Alkaline N batteries produce electricity when the manganese dioxide cathode is reduced. At the same time, the zinc anode is oxidised through the following chemical reaction:

Zn + 2 MnO2 + H2O → ZnO +2 MnOO

The higher density of the manganese dioxide gives the alkaline version a longer and more useful life than zinc carbon batteries.

They range in capacity, and can fall anywhere between 700 to 1000mAh depending on the brand.

N-size alkaline batteries weigh 9 grams and have a volume of approximately 3.4 cm3.

You can use alkaline N batteries for higher drain devices such as:

Digital cameras
Handheld game devices
Wireless mouse
Flashlights
Bluetooth headsets
Portable clocks and radios
Laser pointers

Nickel-Cadmium N Batteries

Nickel-cadmium (NiCd) N batteries are rechargeable cells suitable for lower drain applications. They use nickel oxide hydroxide and metallic cadmium as electrodes featuring a nominal voltage of 1.2 volts and a nominal capacity of 200–500 mAh.

The electrodes are rolled in a spiral jellyroll shape inside the casing and separated from each other by a divider. This structure increases the surface area allowing the cells to provide strong currents with over a hundred times of rechargeable life.

Note:NiCd N batteries have a strongmemory effect, so you need to let them discharge completely and then charge them fully each time. The cells also have a high self-discharge rate, so you can’t buy them in bulk (they only last about 1.5 years in storage).

N-sized NiCd cells support devices such as:

Desk clocks
Remote controls
Door alarm chimes
Automated toys

Nickel Metal Hydride N Cells

As a result of the toxicity of cadmium, nickel metal hydride (NiMH) cells were designed to provide a safer, more environmentally friendly rechargeable option.

They feature a nominal voltage of 1.2 volts with 350–700 mAh of capacity and 1000+ charging/discharging cycles.

Nickel metal hydrides use nickel oxyhydroxide (NiOOH) at the positive terminal. On the negative side, they use an alloy that absorbs hydrogen.

The anode, nickel hydroxide, only exchanges one proton, and the aqueous potassium hydroxide electrolyte doesn’t take part in the chemical reactions. As such, it’s never depleted throughout the battery’s life. This means the cells offer a stable performance with a longer useful life.

In addition, since the potassium hydroxide doesn’t take part in the reaction, the cells don’t suffer from the memory effect that NiCd batteries do.

Note:Memory effect occurs because of how metal reacts with electrolyte salt. Together, they create imperfections that “teach” the battery to function at a new level of charge/discharge.

NiMH batteries are best for high drain devices such as:

Choosing an N Battery to Meet Your Needs

Choosing the right N-size chemistry depends on your needs.

Cheaper zinc-carbon batteries will do just fine for low power devices such as remote controls. However, they have a shorter life, low capacity and tend to leak.

To power high use gadgets with medium to high drain, opt for the nickel-metal hydride rechargeables, which are safer and longer-lasting.

The most versatile option is the alkaline battery which is most common because it’s:

Cost-effective, considering its efficiency and good discharge characteristics
Long-lasting with a wider operating temperature range from as low as -18°C

Alkaline N batteries cater to a wider range of capacities, which means you can use them for both low and high drain devices.

Remember to opt for tried and tested brands, such as Duracell, Ansmann and Energizer, which perform well and give a more stable performance over their useful life.

Here are some examples of the best alkaline N batteries.

Duracell MN900

Ansmann LR1

Feature	Description
Nominal Voltage	1.5 V
Open Circuit Voltage	1.63 V
Capacity	550 to 940 mAh
Internal Resistance	≤ 0.3 Ω
Shelf Life	5 years at ≤ 22°C and Relative Humidity 60 to 75%
Operating Temperature	-20 to 60 °C
Leakage Resistance	High

Energizer E90

Feature	Descriptions
Nominal Voltage	1.5 V
Nominal Internal Resistance	150 to 300 milliohms (fresh)
Operating Temperature	-18 to 55°C
Weight	9 g
Volume	3.3 cm³
Terminal	Flat
Shelf Life	5 years

You can get all of these batteries and more fromHBPlus Battery Specialists. We carry a wide range of N-size batteries to meet the power needs of all your N compatible devices.

If you’re unsure which battery you need,get in touch, and we’ll help you figure it out.

“I can highly recommend the Battery Specialists both for quality batteries and excellent service. I will be buying again from them.”
Paul D Bundaberg, Australia

Frequently Asked Questions

Is there a difference between the N battery and the A23?

The A23 battery has physical dimensions (height and width) of 10.3 x 28.5 mm. In contrast, the N battery is 12.0 x 30.2 mm. They have comparable dimensions; however, they are not interchangeable.

A23s are designed for high capacity devices with a nominal voltage of 12 volts. Compared with the N battery’s nominal voltage of 1.5V, A23s can severely damage your devices.

Do N cells have mercury?

No, mercury oxide cells were phased out due to the toxicity of mercury which poses high risks of nervous, digestive and immune system problems.

Can I use an N-size E90 battery to replace an AA?

AA batteries (14.5 x 50.5 mm) are larger than N-sized batteries. As a result of the larger size, they aren’t directly compatible. However, some devices have a smaller holder in the battery compartment that allows them to work with N-sized cells.