Modern hearing aids are small, sophisticated devices that process complex sound environments. They utilize powerful microprocessors and often include features like wireless streaming, which places significant demands on their energy sources. Understanding how to keep a hearing aid powered is a primary concern, as consistent function is necessary for daily communication.
The Two Main Power Sources for Hearing Aids
The question of whether a hearing aid needs to be charged depends entirely on the power source, as modern devices are split into two distinct categories. One category features built-in, sealed power cells that require daily placement into a docking station to replenish energy, offering a convenient experience that eliminates handling tiny parts.
The alternative category relies on small, replaceable button batteries that are discarded once depleted. This method allows users to carry a supply of fresh batteries for immediate replacement, offering a quick fix for unexpected power loss. Users must choose between the daily routine of charging or the periodic task of replacing the power cell.
How Rechargeable Hearing Aids Work
Rechargeable hearing aids typically utilize sophisticated lithium-ion power cells, similar to those found in smartphones, integrated directly into the device. These internal batteries are designed to last for the expected lifespan of the hearing aid, often around four to five years. Since the battery is non-removable, the hearing aid is placed into a custom charging cradle each night, rather than swapping out a depleted cell.
A full recharge cycle usually takes about three to four hours, which is conveniently done overnight, providing up to 24 hours of continuous use. Many charging cradles use inductive technology, allowing the devices to simply drop into the station without needing to align small ports or cables. This nightly routine ensures the hearing aids are ready to provide consistent power throughout the next day.
For maintenance, it is best practice to always place the hearing aids in the charging station when not in use, even if they are not fully depleted, as this will not harm the lithium-ion cell. Users should avoid storing the devices in an unplugged charging station for extended periods, as the battery may slowly drain. The charging process should occur at moderate room temperatures (typically between 33 and 104 degrees Fahrenheit) to ensure optimal battery health.
Managing Disposable Hearing Aid Batteries
Hearing aids using replaceable power cells rely on zinc-air battery technology, recognizable by a factory-sealed sticker covering tiny air holes. The battery remains dormant until this sticker is removed, allowing oxygen to interact with the zinc inside to activate the power cell. For optimal performance, wait approximately one minute after removing the sticker before inserting the battery into the hearing aid.
The batteries are standardized and color-coded to help users identify the correct size:
- Yellow is Size 10
- Brown is Size 312
- Orange is Size 13
- Blue is Size 675
The size determines its potential lifespan; smaller sizes like 10 last about three to seven days, while the largest size, 675, can last up to 20 days, depending on power requirements. Once the battery is activated, replacing the sticker will not stop the chemical reaction, and it will continue to drain until depleted.
To maximize the lifespan of unused batteries, store them in their original packaging at room temperature, away from extreme heat or moisture. Carrying loose batteries is discouraged because contact with metal objects, such as coins or keys, can cause a short circuit and discharge the battery. When the hearing aid is not in use, opening the battery compartment door helps conserve the zinc-air power cell by limiting its exposure to air.
Selecting the Best Power Option for Your Lifestyle
Choosing between a rechargeable or disposable power source often comes down to individual lifestyle needs and physical capabilities. For individuals with limited dexterity, the rechargeable option is preferable, as it requires only dropping the devices into a charging cradle each night. Conversely, replacing the tiny disposable batteries can be a difficult task for those with fine motor skill challenges.
Travel habits are another consideration, as disposable batteries offer flexibility for trips where access to a wall outlet may be unpredictable or unavailable. Travelers using disposable cells can simply pack a few extra battery packs for backup power. However, many rechargeable models now feature portable charging cases that hold several charges, providing power away from an outlet for several days.
Budgetary concerns also distinguish the two options; rechargeable hearing aids typically have a higher initial purchase price due to the integrated technology. This higher cost is offset by eliminating the recurring expense of buying disposable batteries over the device’s lifetime. Users with high power needs, such as those who stream audio for many hours a day, will find rechargeable batteries provide a more consistent output, though they must manage the daily charging routine.