PowerOne P675 Hearing Aid Batteries (Size 675, Zinc‑Air)

Overview

PowerOne P675 (blue tab) batteries are mercury‑free zinc‑air cells designed for high‑drain devices such as behind‑the‑ear (BTE) hearing aids and many cochlear implant (CI) processors. They deliver a stable 1.45V output and are built with stainless‑steel housings and extra‑long pull tabs for easier handling.

• Best for: Size 675 BTE hearing aids and CI processors that specify disposable 675 cells.
• Typical runtime: 7–14 days in hearing aids; 2–5 days in many CI processors (varies with streaming, noise reduction, and volume).
• Made without mercury: Safer for the environment and compliant with global regulations.

Pros and cons

• Pros: High capacity for demanding devices; consistent 1.45V output; long pull tabs; widely compatible and easy to source.
• Cons: Runtime shortens with heavy Bluetooth/streaming; once activated, cannot be re‑sealed; not compatible with devices that use proprietary rechargeable packs.

When to choose these batteries

• Choose if your device manual specifies size 675 (blue) disposable zinc‑air cells and you need reliable power for high‑drain features like wireless streaming or telecoil.
• Consider alternatives if your CI processor uses proprietary rechargeable modules, or your hearing aids have built‑in lithium‑ion rechargeables—this product will not fit those systems.

Key specifications

• Chemistry: Zinc‑air (mercury‑free)
• Nominal voltage: 1.45V
• Typical capacity: ~600–650 mAh (varies by load and conditions)
• Size code: 675 (blue) — approx. 11.6 mm diameter × 5.4 mm height
• Common cross‑references: A675, 675AE, DA675, PR44, ZA675, AC675, 675HP
• Packaging: Dial packs (e.g., 6 cells) and bulk multipacks
• Shelf life: Up to ~3 years from manufacture when stored unopened at room temperature

Expected runtime (guidance)

Actual life depends on your device’s current draw, volume, and wireless features.

Use case	Typical runtime per cell
BTE hearing aid, light streaming	7–14 days
BTE hearing aid, heavy streaming/noise processing	3–7 days
Cochlear implant processor	2–5 days

Tip: Replace both cells at the same time if your CI uses a two‑cell holder to avoid dropouts.

How to get the most life

1. Activate correctly: Remove the blue tab and wait 2–5 minutes before inserting. This allows oxygen to fully activate the cell.
2. Open the battery door at night: Turning the device off or opening the door reduces drain and moisture build‑up.
3. Keep contacts clean and dry: Wipe the battery and compartment with a dry cloth; avoid touching the air holes.
4. Store at room temperature: Do not refrigerate or expose to heat. Keep sealed until use; once unsealed, the cell will steadily discharge.
5. Avoid loose carry: Use a battery case; coin or key contact can short the cell.

Compatibility and alternatives

PowerOne P675 fits devices that specify size 675 zinc‑air cells. It replaces A675/PR44/DA675/ZA675 and similar codes. Many hearing aids from brands such as Phonak, Oticon, Signia, Widex, and some cochlear implant processors (e.g., selected Cochlear/Med‑El holders) use this size—always confirm in your user manual.

• For cochlear implants: If your manual recommends an implant‑optimized 675 variant (often labeled “Implant” or “Implant Plus”), choose that version for best high‑drain performance.
• Rechargeable options: Some devices support proprietary rechargeable packs or have built‑in lithium‑ion batteries. Standard 675 disposables are not compatible with those systems.

Safety and recycling

• Keep away from children and pets: Button batteries are a choking and ingestion hazard. Seek immediate medical attention if swallowed.
• Do not recharge, short, or incinerate: Zinc‑air disposables are not rechargeable.
• Recycle used cells: Use local battery recycling programs where available. Store spent cells out of reach until drop‑off.

FAQ

How long should I wait after removing the tab?

Wait 2–5 minutes before inserting to allow full activation. This simple step can add hours or even a day to runtime.

Why did my battery die faster this week?

Heavy streaming, higher volume, cold weather, and continuous noise processing increase current draw. Try opening the battery door overnight and limiting streaming when possible.

Can I store spare batteries in the fridge?

No. Store sealed batteries at room temperature, dry, and away from direct sunlight. Refrigeration can introduce condensation and shorten life.

Are all blue‑tab batteries the same?

Blue indicates size 675 across major brands, but performance can vary. Always buy fresh stock and check the expiration date.

Will these work with my cochlear implant?

If your processor uses size 675 disposables, yes. Some models perform best with implant‑optimized 675 cells; check your manual or clinician’s guidance.