The Power One hearing aid batteries have consistently delivered stable and sustained power to more hearing aids than any other battery in the world. The size 675 hearing aid battery is most often used in very powerful devices designed to provide the maximum amplification possible, the largest of hearing aid batteries in production today, the 675 can be found powering devices such as bone anchored hearing aids and super power behind the ear hearing aids.As with all size 675 hearing aid batteries, Power One packaging is blue in color as are the tabs on the back of each battery to help reduce confusion with other similar looking battery sizes. If you are looking for one of the cheapest prices per Power One battery on the Internet then you should choose this great value multi-pack option. Each battery has a shelf life of at least three years so there’s every reason to take advantage of this competitively priced option. Please note – if you require these batteries for a cochlear implant then you should NOT order this item as it will not provide sufficient power