Miracle-Ear hearing aids typically use a variety of battery sizes depending on the specific model. The most common types are the size 10, size 13, size 312, and size 675 batteries. Each of these sizes serves different models and might be selected based on the hearing aid's design, features, and power requirements. It is important for users to check the specifications of their particular hearing aid model to determine the correct battery size. Additionally, some Miracle-Ear hearing aids may offer rechargeable options, which can eliminate the need for disposable batteries altogether. For the most accurate information regarding which battery is suitable for a specific Miracle-Ear model, it is advisable to consult the resources available on their website. This will provide details on battery compatibility and maintenance tips to ensure optimal performance.