312 Hearing Aid Batteries: Top Reliable Brands Reviewed

Size 312 hearing aid batteries power more hearing aids than any other battery size on the market. If you or someone you care for uses a behind-the-ear, receiver-in-canal, or in-the-ear hearing aid, there is a good chance the device takes a 312. Choosing a reliable brand matters because an unexpected dead battery during dinner, a phone call, or a grandchild’s recital is genuinely disruptive.

The good news is that the core options are well-established, widely available, and easy to stock. For a broader look at every size and chemistry option, the Hearing Aid Batteries hub covers the full landscape.

What Is a Size 312 Battery?

Size 312 batteries are small zinc-air button cells, identified universally by a brown tab and the number 312 printed on the packaging. They measure 7.9 mm in diameter and 3.6 mm in height, making them the second-smallest of the four common hearing aid battery sizes (10, 312, 13, and 675).

Zinc-air chemistry is the standard for all four sizes. Unlike alkaline or lithium cells, zinc-air batteries are activated by air rather than stored chemical energy. They arrive factory-sealed with a small adhesive tab covering one or more vent holes on the positive face. Once the tab is removed, oxygen from the surrounding air mixes with the zinc inside the cell and the battery begins generating current. This is why pulling the tab and waiting about one minute before inserting a fresh 312 is a step audiologists consistently recommend. Manufacturer documentation for multiple brands notes that the brief wait allows full activation and can meaningfully extend run time.

Who Uses Size 312 Batteries

The 312 is the dominant size for receiver-in-canal (RIC) hearing aids and slim-tube behind-the-ear (BTE) designs, which are among the most commonly prescribed form factors today. Audiologists writing in The Hearing Journal have noted that the 312 offers a useful middle ground: smaller than a size 13 or 675, making it compatible with more discreet aid designs, yet larger than a size 10, which translates to longer run time between changes.

Many popular prescription devices, including certain Phonak Audeo and Oticon More configurations, use the 312. Ruth’s Phonak Audeo has run on 312s since her fitting in 2019. Specific OTC devices in the Jabra Enhance line also use this size. If you are unsure which size your device takes, the battery compartment door is usually stamped with the size number, and the hearing aid’s manual or manufacturer website will confirm it.

Expected Run Time

Manufacturer documentation for major 312 brands generally cites a run time of three to seven days per battery under typical use conditions. The actual figure depends on the severity of the hearing loss being corrected, the number of hours per day the device is worn, and how much active processing the hearing aid is performing. Bluetooth streaming, for instance, draws significantly more current than passive listening, and owner reviews on Hearing Tracker forums consistently note shorter battery life in users who stream audio from phones or televisions for several hours daily.

Audiologists writing in Hearing Review have also noted that temperature and humidity affect zinc-air performance. Batteries stored in a bathroom medicine cabinet, where steam exposure is common, may underperform compared to those stored in a cool, dry drawer.

Buying Guide: What to Look for in Size 312 Batteries

Chemistry and Voltage Consistency

All three options covered here use zinc-air chemistry, which delivers a stable 1.4 volts throughout most of the discharge cycle before dropping off sharply at the end. This flat discharge curve is important for hearing aids because it means the device performs consistently from the first hour of use until the battery is nearly depleted, rather than gradually fading the way alkaline batteries do in consumer electronics.

Spec data from both Rayovac and Duracell confirms the 1.4-volt nominal output for their 312 cells. For context, hearing aids are engineered specifically around this voltage, and using any other battery chemistry risks underpowering or damaging the device. Stick with zinc-air for hearing aids.

Shelf Life and Storage

Zinc-air 312 batteries have a shelf life of three to four years from the manufacturing date when stored properly with the tabs intact. Buying in bulk (packs of 60 or 80) is a common strategy for caregivers who manage batteries for a family member, because the per-battery cost drops and the supply stays consistent. Our broader resource on hearing aid batteries has more detail on storage best practices across brands and sizes.

Keep spare packs in a sealed bag or small container away from metal objects. Loose batteries carried in a pocket or purse alongside keys or coins can short-circuit, and owner reports on Hearing Tracker forums describe a distinctive hissing or warmth as an indicator that a battery has been accidentally drained this way before it was ever used.

Child-Resistant Packaging Considerations

The U.S. Consumer Product Safety Commission and the FDA have both issued guidance on button cell battery ingestion, which poses a serious risk for young children. Several brands now offer child-resistant packaging as a standard feature. For households that include grandchildren, or any home where young children visit, packaging design is a legitimate selection criterion.

Manufacturer documentation for the Rayovac Proline Advanced line specifically highlights child-resistant packaging as a design feature of their hearing aid battery product. If a caregiver is storing batteries on a nightstand or bathroom counter that children can reach, this is worth noting.

Pack Size and Value

Size 312 batteries are sold in packs ranging from as few as 8 to as many as 80 or more. For someone changing batteries every four to five days, a 60-count pack provides roughly three months of supply. Buying larger packs generally reduces the effective per-battery cost, and verified buyers on Amazon consistently note value as a deciding factor when choosing between name-brand 312 options.

The caveat is that bulk buying only makes sense when the batteries will be used within their shelf life window. A 60- or 80-count pack purchased for one hearing aid user will typically be used well within a three-year shelf window, making bulk purchasing a reasonable strategy for most caregivers and regular users.

Brand Consistency and Availability

Hearing aid users and their caregivers depend on these batteries reliably being in stock. Verified buyer reviews across Hearing Tracker forums and Amazon product pages note that Rayovac and Duracell are the two brands most consistently recommended by audiologists at fitting appointments and follow-up visits. Both brands are stocked by major pharmacy chains, big-box retailers, and online sources, which reduces the risk of running out mid-week when a local option is needed quickly.

Top Picks for Size 312 Hearing Aid Batteries

Rayovac Proline Advanced Hearing Aid Batteries Size 312

The Rayovac Proline Advanced Hearing Aid Batteries | Size 312 | World’s Longest Lasting Battery | Child-Resistant Packaging (60) is a 60-count pack that Rayovac markets specifically on run time and child-resistant packaging. Rayovac is one of the two brands most frequently cited in audiologist recommendations noted across Hearing Tracker forums and professional publications, and this product represents their current premium 312 offering.

Spec data from Rayovac describes the zinc-air chemistry as delivering consistent voltage across the full discharge cycle, which aligns with how zinc-air chemistry behaves across brands. The “world’s longest lasting” marketing claim is a manufacturer assertion; owner reviews on Amazon for this ASIN note generally positive experiences with run time, with several verified buyers specifically mentioning that batteries held up well through daily Bluetooth streaming, which is one of the more demanding use cases for a 312.

The child-resistant packaging is the most distinctive product-level feature here. For caregivers managing batteries in a home where young children visit, that design decision is meaningful in a way that is unrelated to battery performance itself. The 60-count pack size is practical for a single hearing aid user on a standard replacement cycle.

Check current price on Amazon.

Duracell Hearing Aid Batteries Size 312, 60 Count

The Duracell Hearing Aid Batteries Size 312, 60 Count (Pack of 1) is Duracell’s standard 312 offering at the 60-pack count. Duracell is the other brand most frequently recommended by audiologists alongside Rayovac, and the brand recognition carries meaningful weight for new buyers who want the assurance of a name they already trust from consumer batteries.

Zinc-air chemistry operates identically here to the Rayovac option: 1.4-volt nominal output, flat discharge curve, and activation triggered by air exposure when the brown tab is removed. Spec data confirms these parameters are consistent with the broader zinc-air standard. Verified buyers on Amazon for this product note reliable run times and consistent performance, and a number of reviews specifically mention purchasing this pack as an ongoing subscription order, which speaks to repeat-buyer confidence.

This is a practical choice for users who already stock Duracell products and want a single trusted brand across household batteries. Availability at major pharmacy chains and large retailers makes this pack easy to restock quickly if supply runs low.

Check current price on Amazon.

Duracell Activair Hearing Aid Batteries Size 312 (80 Batteries), Brown

The Duracell Activair Hearing Aid Batteries Size 312 (80 Batteries), Brown is Duracell’s higher-count 312 option, offering 80 cells per pack under the Activair product line name. For caregivers managing batteries for a family member or for a user with two hearing aids, the 80-count pack provides a longer supply window and is often the more economical choice on a per-battery basis.

The Activair line uses the same zinc-air chemistry as Duracell’s standard hearing aid battery, and manufacturer documentation confirms consistent 1.4-volt output. Owner reviews on Amazon note strong satisfaction with shelf life and run time. Some verified buyers note that they switched to the Activair 80-count specifically because running out between orders was a recurring frustration with smaller packs.

For bilateral hearing aid users changing both batteries every four to five days, the math on an 80-count pack works out to approximately two months of supply. That replacement cadence is typical for moderate-to-severe hearing loss users who wear their devices throughout waking hours. The brown tab and standard activation procedure apply here as with any zinc-air 312.

Check current price on Amazon.

Closing Thoughts

Size 312 batteries are a small purchase with a real impact on daily life. A reliable supply, kept stored properly and replaced on a consistent schedule, means fewer moments of unexpected silence at the wrong time. All three options covered here come from established brands with strong track records in professional and consumer channels. For anyone managing hearing aid supplies for a family member, building a consistent reorder habit around a trusted 60- or 80-count pack is one of the simplest ways to reduce friction in an already complex care situation. The complete guide to hearing aid batteries is a useful starting point for anyone also thinking through size comparisons, rechargeable alternatives, or long-term cost planning.

Frequently Asked Questions

How long does a size 312 battery last in a hearing aid?

Manufacturer documentation for major brands cites a range of three to seven days per battery under typical conditions. The actual run time depends on hours of daily wear, the severity of hearing loss being corrected, and how much Bluetooth streaming or active noise processing the device performs. Users who stream audio from a phone or television for several hours daily tend to see shorter run times, closer to the three-day end of the range. Owner reviews on Hearing Tracker forums reflect this pattern consistently.

Why should I wait after pulling the tab before inserting the battery?

Audiologists and manufacturer documentation consistently recommend waiting approximately 60 seconds after removing the tab from a zinc-air battery before placing it in the hearing aid. The tab seals the air vents during storage, and oxygen needs time to saturate the zinc inside the cell before the battery reaches full operating voltage. Skipping this step can result in slightly lower voltage at startup, which some users notice as reduced clarity or volume during the first minutes of use.

Can I store size 312 batteries in the refrigerator to extend shelf life?

Major battery manufacturers do not recommend refrigerator storage for zinc-air hearing aid batteries. Condensation from temperature changes can damage the cells and reduce performance. Batteries stored at room temperature in a cool, dry location away from direct sunlight retain their shelf life effectively, which is typically three to four years from the manufacturing date when tabs remain intact. A drawer or closed box in a bedroom or kitchen cabinet works well for most households.

Is there a difference between size 312 batteries from different brands?

All size 312 hearing aid batteries from established brands use the same zinc-air chemistry and deliver a nominal 1.4-volt output, so the underlying technology is consistent. Differences between brands may appear in run time, shelf life, packaging design, and quality control consistency. Verified buyer reviews on Amazon and discussions on Hearing Tracker forums suggest that Rayovac and Duracell are the most consistently well-regarded options, and both are regularly recommended by audiologists at hearing aid fittings.

Are size 312 batteries safe to have around children and pets?

Button cell batteries, including the size 312, pose a serious ingestion hazard for young children and pets. If swallowed, a button cell can cause severe internal injury within hours. Child-resistant packaging, such as that offered by Rayovac’s Proline Advanced line, reduces the risk of accidental access. Caregivers should store batteries in a secured location out of reach and dispose of used batteries promptly in a sealed container. The FDA and Consumer Product Safety Commission both recommend treating all button cells as hazardous household items around young children.

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