Hearing Aid Batteries: Sizes, Color Codes, Lifespan, and How to Change Them

People search for hearing aid batteries when a low-battery beep interrupts a conversation, a drugstore wall looks like a crayon box of tab colors, or a clinic quote forces a choice between disposable zinc-air and rechargeable lithium. This page explains the size and color system, how long cells usually last, how to change them without wasting a fresh pack, and how that choice fits a purchase. It is not a storefront and it does not invent clinic price tables.

Sizes and color codes: the direct answer

What size hearing aid battery do I need? Disposable hearing aids almost always take one of four zinc-air sizes. Starkey's battery FAQ lists the same universal numbering and color coding other major brands use:

Match the number on your current pack or battery door. Do not force a different size into the compartment. Style choice and battery size travel together: canal devices have less room for cells and extras such as a telecoil, which NIDCD notes when it describes canal aids.

Zinc-air disposable vs rechargeable lithium

Two power systems dominate today's market:

• Disposable zinc-air: A button cell with a sealed tab. Peel the tab, air enters, the cell activates, and you replace it when it dies. You always have an instant spare if you carry fresh cells.
• Rechargeable lithium-ion: A sealed battery charged in a dock or case, usually overnight. You stop buying weekly packs, but you depend on the charger and on factory service when the sealed cell eventually wears out.

This page owns the zinc-air sizes, change steps, and safety rules. The full cost and convenience comparison lives in our rechargeable vs battery hearing aids guide. Most new flagship lines default to rechargeable. Zinc-air remains common on older platforms, some custom canal devices, and for buyers who want a swapable spare without waiting on a charge.

How long hearing aid batteries last

Starkey states that standard hearing aid batteries last anywhere from about 3 to 22 days, depending on the type of hearing aid, the battery type and capacity, how often you wear the aids, and how much streaming you do. That range is the honest manufacturer framing. Exact day counts vary by ear, program, and Bluetooth use.

Practical patterns buyers see:

• Smaller size 10 cells in tiny canal devices usually need more frequent swaps than larger size 13 or 675 cells in bigger BTEs.
• Phone calls, media streaming, and high-gain programs shorten runtime on any size.
• A cell that was peeled days earlier, stored against metal, or past a good shelf date can die in a day even when the size is correct.

Device lifespan is a different question. Hearing aids themselves often last about 5 to 7 years with care. See how long hearing aids last for warranty and wear factors. Battery cells are consumables inside that longer service life.

How to change a zinc-air hearing aid battery

1. Wash and dry your hands. Starkey notes that grease and dirt on a battery can damage the aid.
2. Open the battery door over a soft surface so a dropped aid is less likely to crack.
3. Remove the dead cell. FDA and NIDCD both say replace dead batteries immediately. A fully discharged cell can swell and become harder to remove if you leave it in.
4. Peel the colored tab on a fresh cell only when you are ready to use it. The tab is a protective seal. Discharge starts when it comes off.
5. Wait about one to two minutes so air can activate the zinc-air chemistry, then insert the cell with the correct orientation (flat side / plus side as marked on your door).
6. Close the door fully and confirm the aid powers on. Carry a spare sealed pack so a mid-day failure is a two-minute fix, not a silent afternoon.

If you are new to a pair, practice the swap with your clinician present. NIDCD recommends practicing battery changes during the fitting visit so the motion is familiar before you need it in a restaurant bathroom.

Habits that waste batteries (and habits that help)

Manufacturer care pages converge on a short list:

• Open the battery door at night when the aids are out. Moisture can escape, and the cell is less likely to corrode the contacts (Starkey).
• Turn aids off when not in use (FDA and NIDCD).
• Do not peel tabs early. A peeled cell in a drawer is already dying.
• Keep spares away from coins, keys, and other metal so contacts cannot short (Starkey).
• Store packs at room temperature. Do not refrigerate. Avoid hot cars and bathroom steam (Starkey; NIDCD also warns against heat and moisture for the aids themselves).
• Limit unnecessary streaming when you need maximum zinc-air runtime between swaps.

Cleaning still matters for power. Wax-clogged receivers and dirty mics make aids work harder and can sound like a dying battery. Pair this page with cleaning hearing aids when sound drops suddenly.

Safety: kids, pets, and button-cell rules

Hearing aid batteries are small enough to swallow. FDA care guidance and NIDCD care guidance both say to keep batteries and hearing aids away from children and pets, and to replace dead batteries immediately rather than leaving spent cells loose.

U.S. button-cell product safety tightened under Reese's Law (P.L. 117-171). CPSC's button cell and coin battery business guidance explains the federal packaging and product rules in 16 CFR part 1263. That product-scope definition excludes zinc-air button cells of the type used in many hearing aids, and CPSC describes separate packaging timing and zinc-air enforcement discretion on the same page. The consumer takeaway does not depend on memorizing the CFR cite: store spares in their packaging, out of reach, and treat any suspected ingestion as an emergency.

Travel and plane packing

Pack power the way you pack prescriptions: in the bag that stays with you.

• Zinc-air spares: Keep them in original packaging or a plastic case so terminals cannot touch metal. Carry more days of cells than the trip length in case of delays.
• Lithium spares and charging cases: FAA PackSafe requires spare (uninstalled) lithium ion and lithium metal batteries, including power banks and charging cases with internal lithium batteries, in carry-on only. Protect terminals from short circuit. Typical personal lithium ion cells must stay within the 100 Wh limit unless your airline approves a larger spare.

If a gate agent checks your carry-on, remove spare lithium batteries and charging cases and keep them in the cabin with you.

Where this fits in a purchase (soft product context)

Battery type is a power decision, not a brand personality quiz. When you browse the hearing aid catalog, ask each clinic:

• Does this quote use disposable zinc-air or rechargeable lithium?
• If zinc-air, which size, and are starter cells included?
• If rechargeable, what happens when the sealed cell needs factory service, and is a portable charger included?
• How does style choice constrain battery size and features (see types of hearing aids)?

Work those answers into the decision order in how to choose hearing aids. We do not publish per-model clinic prices or star ratings here.

Frequently asked questions