Modern hearing aids typically last about five years with proper care and regular servicing. Most hearing aids come with a three-year warranty that covers annual services and factory issues.
Battery life on rechargeable aids is a full day per charge; disposable batteries last 5–10 days depending on how much you wear them and how much wireless streaming you do.
Regular cleaning and annual services extend a hearing aid's working life significantly — think of it like a car service. Skipping it is the fastest way to end up needing to replace the device sooner than you should.