Sometimes, repairs can cost more than replacement, but that’s usually not the case. If the damage to your device is irreversible and it is covered by your device manufacturer, you certainly want to replace rather than repair. Additionally, if your hearing aids have spent almost as much time in the shop as in your ears (exaggerating, of course), are no longer under warranty, and/or are approaching or beyond five years of service, replace them in order to take advantage of new technology.