These have a best before date of 03/2024. I’ve listed them as expired, but they are not technically expired. Duracell states these last 4 years in storage. I use reinforced paper tape to seal boxes and recycled paper for filler (if needed).
Duracell Hearing Aid Batteries Size 675 (Blue) Disposable, 6-Pack MPN 675
• Best if Used 2028. Power one batteries are manufactured in Ellwangen, Germany, at the world’s most up-to-date and biggest production site for hearing aid batteries. They are produced on fully automated high-speed lines.