Hearing aids require batteries to operate. Your audiologist will tell you the size that your hearing aid requires. Each hearing aid battery size is associated with a color, making the batteries easier to identify when purchasing. See the table below for the size, associated color, and the life expectancy of each battery. The life expectancy can depend on the size of the hearing aid and the amount of use. Batteries can be purchased at a store that has a pharmacy, or from an online merchant. Always buy unopened batteries (with the seal on). It is best to purchase batteries with 1.45 volts, rather than 1.4 volts. This will ensure you do not get a false “low battery warning” from your hearing aid. Some hearing aids have a rechargeable battery option.