What is the shelf life on the power One zinc p312?

Manufacture date is needed on every -front of package- mandatory hearing aid battery mfg i have found dates Oct 2018 still selling here on amazon, today 1/31/2021 .. this is unacceptable we all want to purchase new batteries for best shelf life and overall wearer - performance.

The voltage on these is 1.45v. I've had good luck with these and are certainly less expensive than over the counter batteries.

will these fit HEARusa hearing aids?

Based on the information found for the HEARusa hearing aids, they take size 312. Therefore these batteries will work.

These are size 13 batteries. We do carry size 312A batteries if searched using the following product identifier: B00SJPHZCO.

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🔊 Hear the difference with Powermax – where quality meets convenience!

VALUE PACK - Stock up with 64 batteries, ensuring you’re always powered up and ready to go.
OPTIMAL PERFORMANCE - Count on 1.4V zinc-air technology for consistent and dependable performance.
UNMATCHED LONGEVITY - Experience reliable, long-lasting power for your hearing aids.
ECO CONSCIOUS CHOICE - Go green with mercury-free technology that’s safe for you and the planet.
USER FRIENDLY DESIGN - Enjoy hassle-free battery changes with longer tabs for easy handling.

Powermax USA Premium Zinc-Air Hearing Aid Batteries offer a pack of 64 size 312 batteries that are mercury-free, designed for reliable and long-lasting power. With user-friendly longer tabs for easy installation and 1.4V zinc-air technology, these batteries ensure optimal performance for your hearing aids.