The right battery keeps your hearing aids working as expected, but packages can be confusing when you see several sizes and labels. Start by checking the hearing aid itself or its user guide, then match the battery size code on the packaging. This guide explains common battery sizes, what package labels mean, and practical ways to confirm the type your device uses before you buy or open a pack.
Know the Common Battery Sizes
Disposable hearing aid batteries commonly come in four sizes: 10, 312, 13, and 675. Each size has a standard number and a color code used on many packages: yellow for 10, brown for 312, orange for 13, and blue for 675. Color can help you spot a size quickly, but always confirm the number because packaging designs can vary.
Battery size is not a measure of quality or power setting. It refers to the battery’s physical dimensions and helps determine whether it fits the compartment. A battery that looks close in size may still be too large or too small, so do not force it into the hearing aid. Use the exact size specified for your device.
Read the Package Carefully
Look for the battery size number on the package, such as 312 or 13. Some labels also show a color block, a voltage, or wording such as zinc-air. For most disposable hearing aids, zinc-air batteries are standard. They activate when air reaches the battery through small holes covered by a pull tab.
Check that the package is sealed and that the batteries are within the printed expiration date. Keep the pull tab in place until you are ready to use a battery. Once removed, the battery begins activating; waiting a few minutes before inserting it can allow it to reach its operating level. Follow the hearing aid and battery maker’s instructions if they recommend a different procedure.
Confirm Your Hearing Aid’s Type
Check the user manual, quick-start guide, or product information for the battery size. If you do not have the guide, look inside the battery door or on the device for a size marking. Some rechargeable hearing aids do not use disposable batteries, so first confirm whether your model has a replaceable battery compartment.
You can also compare the old battery with the code printed on its packaging, if you still have it. If the code is missing, take the battery to an audiologist or hearing aid retailer for identification rather than relying on appearance alone. Bring the hearing aid’s brand and model number when asking for help; those details can make it easier to verify the correct type.
Store and Replace Batteries Safely
Store batteries in their original packaging in a cool, dry place, away from children and pets. Do not keep loose batteries with keys, coins, or other metal objects, which can create a short circuit. Avoid storing them in a hot car, bathroom, or refrigerator unless the manufacturer specifically recommends it.
When replacing a battery, open the compartment as directed and note which way the positive and negative sides face. If the door does not close easily, remove the battery and check its size and orientation instead of pressing harder. Dispose of used batteries according to local guidance, and keep them out of reach because swallowed button batteries can cause severe injury.
To choose the right hearing aid battery, confirm whether your device uses disposable batteries, identify its size code, and check the package before opening it. Keep the user guide or a photo of the battery label for future purchases. If you cannot verify the size, ask a hearing care professional or retailer to help match it to your model.