Ansmann hearing aid batteries offer reliable performance for hearing aids and sound amplifiers. These size 13 orange batteries use zinc-air technology, are mercury-free, and provide long durability with a shelf life of up to 4 years. Ideal for behind-the-ear and in-the-ear devices requiring greater amplification and telecoil connectivity. Air-activated design ensures freshness until use, with easy activation after removing the sticker. A cost-effective solution for maintaining hearing device functionality.