Duracell N Battery (MN9100/LR1) — 1.5V Alkaline for Compact Devices

The Duracell N (also labeled MN9100, LR1, or E90) is a small 1.5V cylindrical alkaline battery for devices that need reliable power in a minimal footprint. It is commonly used in keyless entry remotes, compact sensors, miniature flashlights, and certain legacy or specialty electronics.

Key Specs

• Chemistry: Alkaline (primary, non-rechargeable)
• Voltage: 1.5V
• Designations: N / MN9100 / LR1 / E90
• Approx. size: 30.2 mm length × 12.0 mm diameter

Compatibility and Naming

Match the code on your device or old battery. These codes are equivalent: N, MN9100, LR1, E90. Do not confuse with other look-alike formats:

• AAA: larger; will not fit
• A23: 12V remote battery; not compatible
• CR1/3N: 3V lithium; not compatible
• LR44/AG13 and other button/coin cells: different shape and voltage

When to Choose This Battery

• Choose if your device explicitly specifies N/MN9100/LR1/E90.
• Good for compact housings where AAA will not fit.
• Use when steady 1.5V output is required for sensors, transmitters, or small lights.

Avoid If

• Your device calls for A23, CR1/3N, coin/button cells, or rechargeable formats.
• You need rechargeable operation; NiMH “N” options are uncommon and lower-voltage (1.2V) and may not be supported by your device.

Typical Uses

• Keyless entry and small RF remotes
• Miniature and penlight flashlights
• Compact sensors and trackers
• Legacy electronics and select medical devices (use only if specified by the manufacturer)

Installation

1. Verify the code: N / MN9100 / LR1 / E90.
2. Observe polarity: the raised nub aligns with the “+” marking.
3. Clean contacts with a dry, lint-free cloth to remove oxidation.
4. Close the battery door firmly to ensure consistent contact.
5. Test the device to confirm normal operation.

Storage and Safety

• Store spares in a cool, dry place; avoid heat and moisture.
• Remove batteries from devices not used for extended periods.
• Keep out of reach of children and pets; small batteries can be a choking hazard.
• Do not recharge, disassemble, or expose to fire. Recycle or dispose according to local guidelines.

Runtime Guidance (Typical)

Actual runtime varies by device, temperature, and duty cycle. As a rough guide:

• Mini LED penlights: minutes to a few hours of continuous light depending on brightness and driver efficiency.
• Intermittent-use remotes and sensors: weeks to many months, depending on transmission frequency and standby draw.

N vs. Other Small Batteries

Troubleshooting

• Flickering or intermittent power: Reseat battery; clean contacts; check spring tension.
• Short life: High-brightness modes or frequent transmissions drain faster; carry a spare.
• No power: Confirm correct battery type and polarity; inspect for corrosion.

FAQ

Is the Duracell N battery rechargeable?

No. It is a primary alkaline cell. Only use rechargeable alternatives if your device manual explicitly supports them.

What codes are equivalent to the Duracell N?

N, MN9100, LR1, and E90 refer to the same physical format and 1.5V alkaline chemistry.

Can I use an A23 or CR1/3N instead?

No. A23 is 12V and CR1/3N is 3V lithium. Using them in place of an N cell can damage your device.

How should I store spare N batteries?

Keep in original packaging in a cool, dry location. Avoid metal contact and extreme temperatures.

Are N batteries safe for medical devices?

Only use them if your device manufacturer specifies N/MN9100/LR1/E90. For medical equipment, follow the device manual and replace batteries as directed.