This is a complimentary box of 80 Kirkland Signature Size 675 zinc-air hearing aid batteries included free with the purchase of qualifying Kirkland Signature hearing aids at Costco's Hearing Aid Center. Size 675 (also known as PR44) is the largest standard hearing aid battery size and is color-coded blue per international standards.

Kirkland Signature Size 675 batteries deliver 1.45 volts of power and use zinc-air technology, which activates upon removal of the protective tab and exposure to air. These mercury-free batteries are designed for behind-the-ear (BTE) hearing aids and cochlear implant processors that require high power output. Each battery provides extended runtime — typically 10 to 14 days when worn approximately 16 hours per day — making this 80-cell box a generous supply for ongoing hearing aid use.