Generally, we recommend that people look into upgrading their hearing aids every five years. — although some folks will upgrade earlier than that and some later.
The overall “mileage” of your hearing aid depends on a variety of factors, including:
Manufacturing quality
Brand and type/style
How often you use your hearing aid
The amount of wear-and-tear your hearing aid is subjected to regularly.
Maintenance habits
Acute events like water damage, accidental drops, or device loss
Remember, hearing aids aren't like everyday household electronics in stable, temperature-controlled, and relatively static conditions. Since your hearing aids are your constant companion, they’re subject to the same extremes you experience: temperature, wind, rain, dust/debris, ear wax as well as the occasional drop on the floor.