Duracell Coppertop AAA Alkaline Battery (MN2400)

Duracell Coppertop AAA (MN2400/LR03) is a 1.5V alkaline battery made for everyday reliability in remotes, toys, flashlights, wireless mice, and small sensors. It’s a strong choice for low to moderate-drain devices and for stocking emergency kits thanks to its long shelf life.

When to choose this battery

• Use if: Your device is low to moderate drain (remotes, clocks, wireless mice, small flashlights, toys) and you prefer convenient, single-use batteries.
• Avoid if: You need peak performance in cold weather or very high-drain gear (action cameras, photo flashes) — consider Lithium AAA. If the device is used daily and often, NiMH rechargeable AAA may cost less over time.

Key specs at a glance

Type	Alkaline (single-use)
Size / Codes	AAA • LR03 • MN2400 • 24A • E92
Nominal voltage	1.5V
Typical capacity	~900–1200 mAh (varies by load, temperature, and device cutoff)
Shelf life	Up to about 10–12 years when stored cool, dry, and in packaging
Operating range	~ -4°F to 130°F (-20°C to 54°C); performance drops in cold

Real-world runtime estimates

Actual runtime depends on device design, settings, number of cells, and ambient temperature. These are typical ranges:

TV remote	6–18 months	Intermittent, very low drain
Wireless mouse	1–3 months	Polling rate and LED/laser affect life
LED flashlight (50–100 lm, 1×AAA)	2–6 hours	Higher brightness = shorter runtime
Toys with sound/motors	4–10 hours	Heavy, bursty drain
Small sensor/thermometer	6–12 months	Duty cycle and radio use matter

Compatibility and safety notes

• Match chemistries and ages: Do not mix new with used batteries, or different brands/chemistries in the same device.
• Polarity matters: Align + and – as marked to prevent leaks or damage.
• Not rechargeable: Never attempt to recharge alkaline cells.
• Storage: Keep in original packaging, cool and dry; avoid heat, moisture, and direct sun. Do not store in the fridge/freezer.
• Idle devices: Remove batteries if the device won’t be used for a month or more to reduce leak risk.
• Child safety: Keep out of reach; seek medical help immediately if swallowed.
• Disposal: Recycle where local programs accept household batteries; do not incinerate.

Alternatives to consider

Lithium AAA (FR03/L92)

• Best for: High-drain devices, extreme cold, critical gear.
• Pros: Higher energy density, lighter weight, better cold performance, long shelf life.
• Cons: Higher upfront cost.

NiMH Rechargeable AAA (HR03)

• Best for: Frequently used devices (daily toys, game controllers, wireless peripherals).
• Pros: Hundreds of recharge cycles, lower total cost of ownership, good for the environment.
• Cons: Requires a charger; slightly lower initial voltage (1.2V) — check device compatibility.

Buying guide: pack sizes

• 4–8 pack: Occasional household use (remotes, clocks, a mouse).
• 12–24 pack: Multi-device homes or small offices.
• Bulk (36+): Classrooms, facilities, or emergency kits; rotate stock annually.

FAQ

Is MN2400 the same as AAA?

Yes. MN2400, LR03, 24A, E92, and AAA are common codes for the same size.

Can I use these in smoke or CO alarms?

Only if your alarm specifically calls for AAA batteries. Many alarms use AA or 9V; follow the device manual. For critical alarms, check if the manufacturer recommends lithium for longer replacement intervals.

How should I store them for the longest life?

Keep sealed in original packaging at room temperature (around 68–77°F / 20–25°C), low humidity, away from heat and direct sunlight. Do not refrigerate or freeze.

What causes battery leaks?

Common causes include mixing old and new cells, leaving depleted batteries in devices, heat exposure, or short-circuiting. Remove batteries from unused devices and replace the full set together.

Are these recyclable?

Yes, many communities accept household batteries at drop-off points. Check local guidelines; do not dispose of in fire.