Hearing aid batteries will typically last about 5-7 days depending on the size of the battery, the model of hearing aid, the level of hearing loss, and the demands of the location where you use them. The more active your hearing aid needs to be, the more battery power it will use.
Rechargeable batteries are also available for hearing aids. Though using a rechargeable battery would include an initial purchase of a battery charger, rechargeable batteries last about 1 year (about 370 charges) before they need to be replaced. The charging unit does not need to be replaced along with the batteries.
If you’re purchasing batteries from a store, we suggest checking the expiration date prior to purchase as the batteries could have been sitting on the shelf for a while.