Hearing aid performance depends not only on technology and programming, but also on the correct battery type and size. Selecting the right battery ensures clear sound quality, stable performance, and uninterrupted daily use. This article explains the types of hearing aid batteries, their numbering system, color codes, and how to choose the right one.
1. Zinc-Air Hearing Aid Batteries (Most Common)
Zinc-air batteries are the most widely used batteries in hearing aids. They are activated by air when the small sealing tab is removed.
Key characteristics:
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High energy output in small size
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Lightweight and reliable
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Environment-friendly (no mercury)
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Consistent sound quality
Zinc-air batteries are available in four standard sizes, identified by numbers and colors.
2. Hearing Aid Battery Numbers & Color Codes
🔵 Size 10 (Yellow)
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Battery number: 10
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Color code: Yellow
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Used in: Completely-in-Canal (CIC), Invisible-in-Canal (IIC), and very small ITC hearing aids
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Average life: 3–7 days
Best for: Users who want maximum invisibility and lightweight devices.
🔴 Size 312 (Brown)
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Battery number: 312
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Color code: Brown
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Used in: Receiver-in-Canal (RIC) and small In-the-Ear (ITE) hearing aids
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Average life: 5–10 days
Best for: Modern slim hearing aids with good balance of size and power.
🟠 Size 13 (Orange)
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Battery number: 13
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Color code: Orange
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Used in: Behind-the-Ear (BTE) and larger ITE hearing aids
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Average life: 7–14 days
Best for: Moderate to severe hearing loss requiring stronger amplification.
🔵 Size 675 (Blue)
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Battery number: 675
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Color code: Blue
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Used in: Power BTE and cochlear implant sound processors
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Average life: 10–20 days
Best for: Severe to profound hearing loss and high-power devices.
3. Rechargeable Hearing Aid Batteries
Rechargeable hearing aids are increasingly popular due to ease of use and long-term convenience.
Common rechargeable battery type:
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Lithium-ion (Li-ion)
Advantages:
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No daily battery replacement
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One full charge lasts all day
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Cost-effective over long term
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Environmentally friendly
Best for: Users who prefer convenience, senior citizens, and active lifestyles.
4. How to Choose the Right Battery for Your Hearing Aid
The correct battery depends on:
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Hearing aid model and style
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Power requirement of the device
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Usage time per day
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Rechargeable vs disposable preference
Using the wrong battery size may result in:
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Shorter battery life
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Device malfunction
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Improper fit or damage
Always consult an audiologist before switching battery types.
5. Tips to Make Hearing Aid Batteries Last Longer
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Remove the sticker and wait 1–2 minutes before inserting
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Turn off hearing aids when not in use
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Store batteries at room temperature
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Keep away from moisture
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Open battery door at night
Conclusion
Understanding hearing aid battery types and numbers helps you get the best performance from your hearing aids. From size 10 to size 675, each battery is designed for specific hearing aid styles and power needs. Rechargeable batteries provide modern convenience, while zinc-air batteries remain reliable and widely used.
For personalized guidance, battery replacement, or hearing aid care, VR Speech and Hearing Clinic is committed to supporting your hearing health with professional expertise and genuine care.