675 Battery Hearing Aid Guide: Top Brands Reviewed

Size 675 batteries power the largest category of behind-the-ear hearing aids, including most devices worn by people with moderate-to-severe and severe-to-profound hearing loss. If your audiologist fitted you with a BTE or power BTE device, there is a good chance a 675 battery is what keeps it running.

Choosing the right brand matters more than most buyers expect. Battery life, consistency, and tab design all affect daily comfort. The overview below covers what to look for and which products consistently earn strong marks from hearing aid owners.

What Is a 675 Battery Hearing Aid?

The phrase “675 battery hearing aid” refers to any hearing aid that uses a size 675 zinc-air cell. The number 675 is an industry-standard size designation, not a brand or model number. You will also see it labeled as “Blue Tab” in stores, because the industry color-coded the tab pulls by size: 675 batteries carry a blue activation tab.

Size 675 is the largest of the four common hearing aid battery sizes (10, 312, 13, and 675). Its larger physical dimensions allow it to hold more zinc-air chemistry, which translates into more capacity and longer runtime between changes. For a broader look at all four sizes and how to match them to your device, the Hearing Aid Batteries hub is a useful reference point.

Who Uses Size 675?

Size 675 batteries are associated almost exclusively with power and super-power behind-the-ear hearing aids. These are the devices prescribed for people with moderate-to-severe, severe, or profound hearing loss, where the amplifier must work significantly harder than in mild-loss devices. Cochlear implant sound processors also frequently use size 675 cells.

If you are not sure whether your device takes a 675, check the battery door. The size is typically printed on the inside of the door or on the manual that came with the hearing aid. Audiologists writing in The Hearing Journal note that a battery that is even one size off will not seat correctly, so confirming the size before ordering in bulk is worth the extra minute.

Why Zinc-Air Chemistry Matters

All major hearing aid batteries, including every size 675 option on the market, use zinc-air chemistry. This technology works by pulling oxygen from the surrounding air through small holes in the cell casing. The blue tab on a fresh battery seals those holes, keeping the cell inactive until you are ready to use it.

Zinc-air chemistry delivers a notably flat discharge curve, meaning the voltage stays close to 1.45 volts for most of the battery’s life and then drops off quickly at the end. That consistency is important for hearing aids because stable voltage helps maintain stable amplifier output, which affects sound quality. Hearing Tracker forum members frequently note that generic or off-brand zinc-air cells can deliver shorter and less consistent runtimes than name-brand options, even when the stated capacity looks similar on paper.

Expected Runtime for Size 675

Manufacturer documentation for size 675 batteries typically states a rated capacity in the range of 600 to 650 milliamp-hours. In real-world use, that translates to roughly 9 to 20 days of runtime, depending on how many hours per day the aid is worn, how much streaming or Bluetooth the device does, and the specific hearing aid’s power draw.

Heavy streamers, such as users who pipe audio from a smartphone or TV device for several hours a day, will generally land at the shorter end of that range. Owners who wear their aids primarily for conversation in quieter environments often report reaching the higher end. Verified buyers on Hearing Tracker and Amazon indicate that the brand of battery meaningfully affects where an individual lands within that range, which is one reason many experienced users stick with a specific brand once they find one that performs consistently.

Buying Guide: What to Look for in a 675 Hearing Aid Battery

Freshness and Shelf Life

Zinc-air batteries begin aging from the moment they are manufactured, whether or not the tab has been pulled. Most manufacturers print a use-by date on the packaging, and that date matters. Manufacturer documentation for leading brands states shelf lives of three to four years from the manufacturing date under proper storage conditions (cool, dry, away from direct sunlight). Buying in bulk is cost-effective, but only if you can realistically use the batteries before the expiration date.

When ordering online, checking seller reviews for complaints about short remaining shelf life is a reasonable precaution. The hearing aid battery category on this site includes additional guidance on reading expiration dates and storage best practices.

Tab Design and Ease of Handling

The activation tab pull is a small but genuinely important detail for people with dexterity limitations. A tab that tears flush with the cell surface, or that requires significant grip strength to remove, can make daily battery changes frustrating. Some brands engineer a longer or stiffer tab specifically to accommodate users who have difficulty with fine motor tasks. Owner reviews across Hearing Tracker and Amazon frequently cite tab quality as a factor in long-term brand loyalty.

Size 675 cells are physically the largest hearing aid battery, so handling is somewhat easier than with sizes 10 or 312. Even so, a well-designed tab with a firm pull point makes a real difference, especially for older users or those with arthritis.

Mercury-Free Formulation

Prior to a 2011 phase-out in the United States, hearing aid batteries contained small amounts of mercury as a performance stabilizer. Modern size 675 batteries from reputable brands are mercury-free. This matters both for environmental disposal and, in some regions, for regulations governing battery recycling.

If you are purchasing from an unfamiliar brand, the product packaging or Amazon listing should explicitly state “mercury-free” or “Hg 0%.” Any legitimate hearing aid battery sold through major retailers in the United States today should meet this standard.

Packaging Count and Storage

Size 675 batteries are available in packs ranging from 6-count single cards up to bulk packs of 60 or more. For most users replacing batteries every one to two weeks, a 60-count pack typically covers several months of use. Storing extras in a medicine cabinet or cool drawer is fine; refrigerating them is not recommended, as condensation when the battery warms back up can affect performance.

Organized storage also helps with the activation step. The standard recommendation is to pull the tab and then wait roughly two minutes before inserting the battery, allowing the zinc-air reaction to fully activate. Many experienced users report that following this step consistently produces better and more uniform runtime.

Top Picks for Size 675 Hearing Aid Batteries

Rayovac Extra Hearing Aid Batteries Size 13 (60-Pack)

Rayovac Extra hearing aid batteries size 13 is listed by Rayovac across multiple sizes, including 675, under the Extra product line. The Extra line uses standard zinc-air chemistry with a mercury-free formulation and is rated at 1.45 volts, consistent with industry norms for this size category.

The 60-count pack is a practical choice for anyone whose primary user goes through batteries regularly. Rayovac has been manufacturing hearing aid batteries for decades, and the brand holds a strong position in the North American market. Owner reviews on Amazon and Hearing Tracker consistently describe the Extra line as reliable, with few complaints about early failure or inconsistent runtime. The packaging design includes a standard blue activation tab.

Spec data shows the Extra line is produced to standard IEC sizing tolerances, meaning the physical dimensions will be compatible with any hearing aid that accepts a size 675 cell. Users who have switched to Rayovac from other brands occasionally note that the tabs pull cleanly without tearing, which is a frequently cited positive in reviews from older users.

Check current price on Amazon.

Duracell Hearing Aid Batteries Blue Size 675

Duracell Hearing Aid Batteries Blue Size 675 is one of the most recognized products in this category. The blue tab color-coding matches the industry standard for size 675, and Duracell markets this product as featuring an “EasyTab” design intended specifically to make installation more accessible.

The EasyTab feature is specifically called out in verified buyer reviews from users with arthritis and reduced grip strength, who describe it as genuinely easier to handle than competing products. Duracell’s hearing aid battery line is mercury-free and rated at 1.45 volts. The 12-count pack is a mid-range quantity option for buyers who prefer not to commit to a large bulk purchase before trying the brand.

Owner reviews across multiple retail platforms generally rate Duracell 675 batteries as consistent performers. A smaller number of reviews mention shorter-than-expected runtime, though this appears in Hearing Tracker forum discussions to correlate with heavy streaming use rather than product defect. Manufacturer documentation states compatibility with all major hearing aid brands that use size 675 cells.

Check current price on Amazon.

Powerone Size 675 Hearing Aid Battery (60-Pack)

Powerone size 675 Hearing Aid Battery is manufactured in Germany by VARTA, one of the largest battery manufacturers in Europe. The German manufacturing origin is explicitly noted in the product title and is a point frequently raised in owner reviews as a quality indicator. The 60-count pack carries a mercury-free designation and the standard 1.45-volt zinc-air rating.

Powerone holds a notably loyal following among audiologists and experienced hearing aid users. Hearing Tracker forum members who have tried multiple brands often cite Powerone as a consistent performer, particularly for power BTE devices that draw more current. The brand’s reputation for quality control is mentioned regularly in reviews, with very few complaints about dead-on-arrival cells or early runtime failure.

The packaging design includes the standard activation tab and is organized in individual strip packs, which aids in tracking freshness and remaining supply. For users or caregivers managing battery changes for someone with significant hearing loss, the strip format also makes it easy to hand off individual cells without fumbling with a bulk container.

Check current price on Amazon.

Closing Thoughts

Size 675 batteries are a recurring, ongoing expense for anyone wearing a power BTE hearing aid, so finding a brand that delivers consistent runtime and reliable quality matters in practical terms. All three products covered here use mercury-free zinc-air chemistry, meet the 1.45-volt standard, and are available from established manufacturers with track records in the hearing care space.

For buyers new to this category, Duracell’s EasyTab design makes it a reasonable starting point if ease of handling is a priority. Powerone is worth considering for users with high-draw devices or those who want German-manufactured quality assurance. Rayovac Extra’s 60-count bulk format suits regular users looking for a dependable supply at a practical quantity. Additional context on choosing between battery sizes and formats is available on the Hearing Aid Batteries hub page.

Frequently Asked Questions

What hearing aids use size 675 batteries?

Size 675 batteries are used in power and super-power behind-the-ear hearing aids, which are typically prescribed for moderate-to-severe, severe, or profound hearing loss. Some cochlear implant sound processors also use this size. The size is printed inside the battery door of most devices. If you are unsure, your audiologist or the manufacturer’s support line can confirm the correct size for your specific model.

How long do size 675 hearing aid batteries last?

Manufacturer documentation for leading brands rates size 675 cells at approximately 600 to 650 milliamp-hours of capacity, which typically translates to 9 to 20 days of real-world use. Runtime depends heavily on daily wear hours, Bluetooth streaming volume, and the specific hearing aid’s power requirements. Verified buyers on Hearing Tracker note that heavy streamers often see runtimes closer to the lower end of that range.

Does it matter which brand of size 675 battery I buy?

Brand does affect performance in a meaningful way. Owner reviews on Hearing Tracker indicate that name-brand zinc-air cells from manufacturers like Rayovac, Duracell, and Powerone tend to deliver more consistent runtime and fewer early-failure incidents than lesser-known alternatives. The zinc-air chemistry is the same across manufacturers, but quality control in manufacturing and freshness at the point of purchase vary, and those factors influence real-world battery life.

Can I store size 675 batteries in the refrigerator to extend shelf life?

Refrigeration is not recommended for zinc-air hearing aid batteries. Manufacturer documentation from major brands advises storing batteries at room temperature in a cool, dry location. Refrigerating the cells risks condensation forming inside the packaging when the battery returns to room temperature, which can interfere with the zinc-air activation holes and reduce performance. A standard medicine cabinet or a cool kitchen drawer is a better storage environment.

What does the blue tab on a size 675 battery do?

The blue tab seals the small air intake holes on the surface of the battery cell, keeping the zinc-air reaction from starting prematurely. Once you pull the tab, air enters the cell and the activation process begins. The standard recommendation is to wait about two minutes after pulling the tab before inserting the battery. This allows the reaction to fully engage and tends to produce more consistent performance across the battery’s full discharge cycle.

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