P312 Powerone hearing

Overview

PowerOne P312 (PR41, brown tab) zinc‑air batteries provide consistent 1.45V power for size 312 hearing aids, including many ITC and small behind‑the‑ear models. They are mercury‑free, made in Germany, and packaged with extra‑long tabs for easier handling.

Key benefits

• Reliable performance for modern features such as wireless streaming and directional mics
• Mercury‑free composition and corrosion‑resistant stainless‑steel case
• Easy handling with long pull tabs and resealable dial packs for travel

Runtime expectations

• Light use (few hours/day, minimal streaming): about 5–7 days
• Mixed use (calls, occasional streaming): about 4–6 days
• Heavy use (frequent streaming/high gain): about 3–5 days

Actual life varies with hearing loss level, device model, ambient temperature, and wireless use.

How to use

1. Peel off the brown tab only when ready to use.
2. Wait 1–2 minutes to let air activate the cell fully.
3. Insert with the + side up. Close the battery door.
4. Open the hearing aid battery door when not in use (e.g., overnight) to reduce drain.

When to choose vs. avoid

• Choose if your hearing aid specifies size 312/PR41 disposable batteries and you want predictable, quick replacement power.
• Avoid if your hearing aid is rechargeable‑only or uses a different size (10 yellow, 13 orange, 675 blue). Check your manual or labeling.

Specifications

Size / Code	312 / PR41 (brown)
Chemistry	Zinc‑air (mercury‑free)
Nominal voltage	1.45 V
Typical capacity	~160–175 mAh
Dimensions	7.9 mm diameter × 3.6 mm height
Shelf life (sealed)	Up to ~3 years
Compatibility	Size 312 hearing aids; also labeled PR41/312/ZA312 (brown)
Rechargeable?	No (single‑use disposable)

Storage and safety

• Store at room temperature; avoid heat, moisture, and refrigeration.
• Keep tabs on until use; air exposure starts the discharge.
• Carry spares in the original pack—avoid loose contact with coins or keys.
• Keep away from children and pets. If swallowed, seek immediate medical help or contact Poison Control.
• Recycle used batteries where available; do not incinerate.

Alternatives

• Rechargeable hearing aids: use the manufacturer’s charging system (not compatible with these disposables).
• Other sizes: select size 10 (yellow), 13 (orange), or 675 (blue) if your device requires them.

FAQ

How long do P312 batteries typically last?

About 3–7 days per cell, depending on streaming, amplification level, and daily hours of use.

Do I need to wait after removing the tab?

Yes. Wait 1–2 minutes to allow full air activation before inserting for best performance.

Can I recharge these batteries?

No. These are single‑use zinc‑air cells. Use only with devices designed for disposables.

How do I know when to replace the battery?

You may hear warning beeps, notice weaker or distorted sound, or the device may shut down. Replace with a fresh cell.

Are they safe for the environment?

They are mercury‑free. Recycle used batteries at designated collection points where available.