Duracell Hearing Aid Battery 312 (DA312) — Reliable Zinc‑Air Power for Everyday Listening

Duracell Size 312 (DA312) is a zinc‑air, brown‑tab hearing aid battery designed for BTE, RIC, and ITE devices that specifically call for 312/PR41. It delivers steady voltage for clear speech and essential features like noise reduction and directional microphones.

When to Choose Size 312

• Your hearing aids specify 312/PR41 (brown tab).
• You want a compact battery with solid day‑to‑day runtime.
• You use conversation, phone calls, and occasional streaming.

When to Avoid

• Your device requires a different size (10/yellow, 13/orange, or 675/blue) or a built‑in rechargeable system.
• You need maximum runtime and your device supports a larger size (e.g., size 13). Battery sizes are not interchangeable—always follow your manual.

How Zinc‑Air Batteries Work

These cells are sealed and inactive until the tab is removed. Air enters through tiny ports and activates the chemistry.

• Peel the brown tab only when ready to use.
• Wait 1–2 minutes before installing; up to 5 minutes can help in very dry or cold conditions.
• Re‑sealing the tab will not stop the reaction—use after activation.

Runtime Expectations

• Light speech use, minimal streaming: about 4–7 days (roughly 60–100 hours).
• Mixed use with some streaming: about 2–5 days (30–70 hours).
• Heavy streaming or noisy environments: about 1–3 days (15–40 hours).

Actual life varies with gain settings, feedback control, Bluetooth/streaming time, and ambient temperature/humidity.

Technical Snapshot

• Chemistry: Zinc‑air (primary)
• Nominal voltage: ~1.45 V
• Designation: 312 / PR41 (brown tab)
• Dimensions (typ.): 7.9 mm diameter × 3.6 mm height

Installation Tips

1. Remove the tab and let the battery breathe for 1–2 minutes.
2. Open the battery door and align polarity (“+” usually faces the door).
3. Seat the cell flat; close the door gently without forcing.
4. Run a quick listening check in quiet and then in a busier space.

Maximizing Runtime

• Open the battery door overnight (if recommended for your model) to reduce idle drain.
• Use low‑power programs in quiet settings when available.
• Keep air ports and contacts clean and dry; avoid lotions and steam.
• Store spares in their original packaging at room temperature—never in a refrigerator or hot car.

Troubleshooting

• Weak or distorted sound: Re‑seat the battery, ensure the door latches, and check for moisture or wax near contacts.
• Short life: High gain, frequent streaming, or noisy environments increase draw—carry spares.
• Intermittent power: Inspect spring contacts for debris; wipe the battery with a dry, lint‑free tissue. Try a fresh cell from a different card if the issue persists.

Compatibility & Alternatives

• Size is device‑specific. 312 (brown) will not fit or function in devices designed for 10 (yellow), 13 (orange), or 675 (blue).
• If you want longer life and your device allows, size 13 typically provides more capacity but requires a device designed for it.
• Rechargeable hearing aids with sealed lithium systems are not compatible with zinc‑air primaries.

Safety & Disposal

• Keep batteries away from children and pets; button batteries are hazardous if swallowed. If ingested, seek immediate medical attention or contact Poison Control.
• Do not carry loose cells with coins or keys; use the original pack.
• Recycle or dispose of used cells according to local guidelines.

FAQs

How long does a Duracell 312 battery last?

Many users see about 3–7 days in typical use. Heavy Bluetooth streaming or high gain can reduce life to 1–3 days.

Are 312 and PR41 the same?

Yes. PR41 is the IEC code for size 312 (brown tab).

Can I re‑seal the tab to save the battery?

No. Once the tab is removed, air activates the chemistry and the cell continues to age.

Can I use 312 batteries in a rechargeable hearing aid?

No. Devices with built‑in rechargeable systems are not compatible with zinc‑air primaries.

Should I refrigerate hearing aid batteries?

No. Store at room temperature in a dry place to avoid condensation and performance issues.

Summary

Duracell 312 (DA312) offers dependable zinc‑air power in a compact, brown‑tab format for devices that specify 312/PR41. Activate only when ready, install carefully, and follow storage and care tips to get consistent, clear performance throughout your day.