Depending on your specific model, you may find that you use a fair amount of batteries each month, but every situation will be different. Some styles offer rechargeable options, giving you the convenience of never having to worry about changing your device’s batteries again. Yet in most cases, you can expect to change your hearing aid batteries every 5 to 21 days depending on the style, battery size, and how frequently you use your devices. To help extend your battery life, try the following options: