Who makes Kirkland Signature Hearing Aid Batteries (Zinc Air, Sizes 10, 13, 312, 675)?
No reliable public evidence identifies the manufacturer of Kirkland Signature Hearing Aid Batteries (Zinc Air, Sizes 10, 13, 312, 675) as of July 11, 2026.
The common claim
What most answers say — and what the evidence supports
The prevailing answer - repeated by coupon blogs and forum lore - credits Rayovac, now part of Energizer Holdings. Every version traces to a single consumer-blog line claiming Rayovac production 'as of 2016,' which that blog itself presents as secondhand and unconfirmed ('Trying to track down if this is still accurate'). No tier 1-5 source names any maker, and the physical evidence cuts both ways: buyers report packs printed 'Made in Germany' - home turf of Varta Microbattery, not Rayovac, whose zinc-air plants run in the US and UK - while newer community posts describe US-made packs. No consistent, evidenced name emerges.
Evidence & sources
Costco does not disclose its suppliers, and no tier 1–5 source names the maker of this product. Below is the documented search — every database and record we checked, and what each one returned.
CPSC recall database (SaferProducts.gov REST API) July 5, 2026
Zero recalls for hearing-aid batteries of any brand ('hearing aid battery' product query returns no results) and no Kirkland battery recall on file. No maker surfaces via the recall route.
SEC EDGAR full-text search (2001-present) July 5, 2026
"Kirkland Signature" + "hearing aid": 41 hits, every one an Eargo, Inc. filing describing Costco's hearing-aid business as competition. Energizer Holdings, owner of the rumored maker Rayovac since January 2019, has zero filings mentioning 'Kirkland Signature'. No filer ties the batteries to any manufacturer.
CourtListener / RECAP federal court records July 5, 2026
"Kirkland Signature" + "hearing aid": 4 results, none about batteries and none naming a supplier.
Costco.com pages (via Wayback Machine; live site bot-walled) July 5, 2026
The hearing-aid-batteries category snapshot (2024-09-10) contains no manufacturer data. The Size 10 product page (item 100428083) has never been archived, and a 2026-07-05 Wayback save attempt captured only Costco's bot-challenge page - notable because Costco's newer product-page template embeds an internal mfName manufacturer field that names real makers on other Kirkland items (PHARMAVITE on fish oil, WN PHARMACEUTICALS on krill oil, TRIDENT SEAFOOD CORP on Wild Alaskan fish oil). Costco's customer-service FAQ 'Why has the packaging changed for the Kirkland Signature hearing aid batteries?' (answer 1014997) is likewise unarchived and bot-walled. Both flagged for a manual browser check.
News and executive-statement sweep (Google/Bing news, hearing-industry trade press) July 5, 2026
Costco's CEO publicly credited Duracell for Kirkland alkaline batteries (2016 statement, widely reported), but no executive statement or news article covers the zinc-air hearing-aid line, and hearing-industry trade press does not name the maker.
Community/rumor scan (rather-be-shopping.com, hearingtracker.com forums) July 5, 2026
The Rayovac claim traces to a single line in rather-be-shopping.com's Costco batteries guide - secondhand ('I've also read...', 'as of 2016') with the author adding 'Trying to track down if this is still accurate' (verified in the 2025-04-20 snapshot: https://web.archive.org/web/20250420104935/https://www.rather-be-shopping.com/blog/costco-batteries/). Hearingtracker forum threads (2023-2026) compare Kirkland packs against Rayovac and power one on price and battery life but never document who makes them.
Packaging / country-of-origin observations (Amazon buyer Q&A, Walmart marketplace listing, hearing-forum posts) July 5, 2026
Conflicting: an Amazon buyer Q&A and a Walmart marketplace listing report packs printed 'Made in Germany', while a 2024 hearing-forum description refers to US-made packs. Zinc-air hearing-aid batteries come from a handful of plants worldwide (Rayovac's plants in the US and UK; Varta Microbattery's German plant, which produces the power one brand), so the country printing narrows candidates without naming one - and Germany-marked packs sit oddly with the Rayovac rumor. Route inconclusive.
Costco customer-service FAQ, answer 1014997 ('Why has the packaging changed for the Kirkland Signature hearing aid batteries?') July 11, 2026
Previously bot-walled; now reached and snapshot-archived (https://web.archive.org/web/20260711154218/https://customerservice.costco.com/app/answers/answer_view/a_id/1014997). The answer (Doc ID CU2719, published 2025-08-22) attributes the packaging change entirely to Reese's Law - the federal child-resistant packaging mandate covering button-cell and zinc-air batteries - and names no manufacturer. Closes the packaging-change lead: it carries no supplier signal.
Frequently asked
Who makes Kirkland Signature hearing aid batteries?
Are Kirkland hearing aid batteries made by Rayovac?
Where are Kirkland Signature hearing aid batteries made?
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