Based on this product's specifications, here are some alternatives and similar models
Hearing aid batteries Panasonic PR312L/6DC 1.4V — 6-pack
Summary description:
Panasonic PR312L/6DC hearing aid batteries are size 312 (PR41) zinc-air cells with a nominal voltage of 1.4 V, supplied as a pack of six. Designed for use in compatible behind-the-ear and in-the-ear hearing aids, they provide stable power for daily listening needs. Easy-to-install tab design and individually sealed tabs help preserve life until activation.