How long do these usually last? Like a single battery?

I've been using Duracell batteries for the last 9 months, since Feb. 8, 2017. I've always kept a record of my hearing aid battery usage since I started using hearing aids in July 2005. The battery in my right hearing aid lasts 4.5 to 5 days & the battery in my left hearing aid lasts 5 to 6 days. I can't see much of a difference in time from the batteries I've used before but the purchase price on this Duracell order was the best I could find lately.

Are the duracell activair hearing aid batteries mercury free?

Since info says zinc air I assume they are mercury free. Better be.

I'm going to make an assumption here. I am guessing that that customer wants to know where they are made, not just the brand name. These Duracell batteries most likely were made by Duracell. According to the packaging, they were made in Germany. They work very well and, so far, have last longer than other brands. Hope this answers your question!

What is the difference between a #10, 4v. And a #10, 4.5v can they be used interchangeably? Will it damage my aids?

You mean 1.4 vs 1.45 volts? I guess standard #10 is 1.45V. 1.4V will not damage Aid, but may perform below peak.

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DURACELLActivair Hearing Aid Batteries: Size 10 (80 Batteries)

4.7/5

Product ID: 6719667

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Details

Number of Batteries
80 Product
Brand
DURACELL
Battery Cell Composition
Zinc-Air
Recommended Uses For Product
Hearing Aid
Unit Count
80 Count

⚡Zinc-Air Tech

📦80 Count Pack

🔋1.45V Power

Description

🔊 Hear the Difference with Duracell!

EASY TAB DESIGN - Open with ease—no more fumbling with complicated packaging.
COMPACT DISCREET - Perfectly sized for your hearing aid, ensuring a seamless fit.
UNMATCHED LONGEVITY - Experience reliable, long-lasting power that keeps you connected.
SINGLE USE CONVENIENCE - Each battery is designed for one-time use, ensuring optimal performance.
TRUSTED DURACELL QUALITY - Join millions who trust Duracell for their power needs.

Duracell Activair Hearing Aid Batteries are designed for optimal performance with a reliable 1.45-Volt zinc-air technology. This pack includes 80 size 10 batteries, ensuring you have a long-lasting supply to keep your hearing aids powered and functioning effectively.

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Item Dimensions	6.3 x 5.31 x 1.97 inches
Battery Weight	0.25 Pounds
Unit Count	80 Count
Battery Cell Type	Zinc-Air
Recommended Uses For Product	Hearing Aid
Reusability	Single Use
Voltage	1.45 Volts

DURACELLActivair Hearing Aid Batteries: Size 10 (80 Batteries)

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