Reliable long lasting batteries with convenient EasyTab Extra long tabs make the batteries easier to remove from the package, hold, and insert in the hearing aid. Batteries do not contain any added mercury. Each battery is individually date-coded for efficient inventory management. Features Duralock Power Preserve(TM) technology. Batteries remain dependable for up to 4 years in storage. Duracell(R) 1.4 Volt Zn-air Hearing Aid Batteries With EasyTab, DA312B8ZM09 is one of many Hearing Aid Batteries available through Office Depot. Made by Duracell.