Duracell AAAA (MN2500) Specialty Alkaline — Slim 1.5V Battery for Stylus Pens and Compact Devices

The Duracell AAAA (MN2500) Specialty Alkaline battery delivers reliable 1.5-volt power in an ultra-slim cylinder designed for electronics where space is tight and weight matters. You’ll find AAAA cells in active stylus pens, digital thermometers, glucose meters, laser pointers, Bluetooth headsets, and compact pen lights. When your device calls for “AAAA” or “MN2500,” this battery provides steady voltage, dependable shelf life, and leak-resistant construction to keep essential tools running day after day.

Key Advantages

• Ultra-slim profile: Fits devices that cannot accommodate AAA cells.
• Consistent 1.5V output: Supports accurate sensors and precise electronics.
• Lightweight design: Ideal for pens and wearables where balance and comfort matter.
• Leak-resistant build: Helps protect delicate contacts and circuit boards.
• Strong shelf life: Keep spares ready for quick swaps.

Common Uses

• Active stylus pens (digital pens) and note-taking tools
• Glucose meters and health instruments (as specified)
• Laser pointers and pen lights
• Bluetooth headsets and compact gadgets
• Digital thermometers and instrumentation

Specifications

• Chemistry: Alkaline
• Voltage: 1.5V
• Designation: AAAA / MN2500
• Typical dimensions: ~42.5 mm length × ~8.3 mm diameter
• Type: Primary (non-rechargeable)

AAAA vs. AAA vs. Button Cells

AAAA is slimmer and shorter than AAA, making it suitable for pen-style devices. It is not interchangeable with coin or button cells, which have different shapes and voltages. Always install the exact size the device specifies to ensure proper fit and performance.

Installation Steps

1. Confirm size: Look for “AAAA” or “MN2500” in the manual or on the battery door.
2. Observe polarity: Align the positive tip with the “+” marking in the tube.
3. Check contact rings: Wipe gently with a dry, lint-free cloth.
4. Seat fully: Ensure the battery slides smoothly and the cap closes without resistance.
5. Test function: Power on the device and verify responsiveness.

Storage, Handling, and Safety

• Keep sealed in original packaging until use.
• Store at room temperature; avoid extreme heat or humidity.
• Remove batteries if storing devices long-term to reduce leakage risk.
• Keep out of reach of children; dispose of used cells properly.

Maximizing Runtime

• Turn devices off when not in use.
• Use power-saving modes on stylus pens where available.
• Replace batteries in sets if your device uses multiples.
• Keep contacts clean to minimize resistance.

Troubleshooting

• Intermittent pen strokes: Reseat the cell, clean contacts, and confirm correct polarity.
• Short life: High-brightness pen lights or continuous Bluetooth use can increase draw; consider usage patterns.
• No power: Ensure you’re using AAAA—not AAA—since housings can appear similar.

FAQs

Can I use rechargeable alternatives?

Only if the device manual explicitly allows it; most AAAA devices expect primary alkaline cells.

How long will AAAA last in a stylus?

It depends on daily usage, pressure sensitivity features, and idle timeouts. Many styluses last weeks to months per cell.

Is leakage a concern?

Modern cells are designed to be leak-resistant, but remove batteries from long-stored devices as a best practice.

Summary

Duracell’s AAAA (MN2500) Specialty Alkaline provides slim, dependable 1.5V power for stylus pens and compact electronics. Use the correct size, install properly, and store spares well for consistent performance.