Rechargeable hearing aids are popular due to their simplicity, reliability, and environmental benefits. These devices eliminate the need to regularly handle and replace disposable batteries, offering a full day of uninterrupted hearing on a single charge. This convenience relies on lithium-ion power cells, the same technology found in modern electronic devices. This guide provides an overview of the charging process and strategies to ensure your hearing aids perform optimally.
Understanding Your Charger Technology
Modern rechargeable hearing aids use one of two methods to transfer energy from the base to the device. The first is contact charging, also known as galvanic charging, which requires the hearing aid’s metal contacts to align precisely with corresponding pins or ports in the charger well. This system relies on a physical connection for the electrical current to flow into the battery.
The second method is inductive charging, which utilizes electromagnetic induction to transfer power without physical contact between metal points. In this non-contact system, you simply place the hearing aid into the charger well, and charging begins automatically. Inductive charging is preferred because it simplifies the process for users with dexterity challenges and prevents corrosion or blockage of electrical contacts.
Chargers vary between stationary plug-in models and portable charging cases. Stationary chargers require a constant connection to a wall outlet or USB port, typically placed on a bedside table for overnight charging. Portable cases contain a built-in power bank, allowing the hearing aids to be charged multiple times while traveling without an external power source.
The Standard Step-by-Step Charging Process
Starting the charging process correctly ensures a complete and efficient power cycle. Before placing the aids into the charger, wipe them clean with a soft, dry cloth to remove any moisture or earwax buildup. This preparation prevents debris from interfering with the charging contacts or the inductive field.
Next, carefully place each hearing aid into its designated charging well, often indicated by color-coding (red for the right aid and blue for the left aid). Most modern hearing aids automatically turn off once they are correctly seated. Visually confirm that charging has begun by checking the indicator lights on the devices or the charger base.
The indicator light will blink, glow amber, or turn red to signal that charging is in progress. Once the battery is fully replenished (usually after about three to four hours), the light will change to a solid color, such as green or white, confirming the cycle is complete. It is safe to leave the hearing aids in the charger overnight, as lithium-ion technology manages the power flow to prevent overcharging.
Maximizing Battery Health and Longevity
The internal lithium-ion batteries are designed to last for the device’s typical lifespan (often four to five years), but proper care ensures longevity. A primary habit is placing the hearing aids in their plugged-in charger every night, even if they have not been fully drained. Unlike older battery chemistries, contemporary lithium-ion batteries benefit from consistent charging and do not require a full discharge cycle to maintain capacity.
Avoiding exposure to temperature extremes is beneficial for battery health, as high heat can degrade the internal components of the power cell. Never leave your hearing aids or the charger in direct sunlight, such as on a windowsill or car dashboard. When storing aids for an extended period (several weeks or months), consult your user manual; it is best to store them with a partial charge, around 50%, in a cool, dry place.
During daily use, advanced features like Bluetooth streaming or noise cancellation consume more power, potentially reducing the time from a single charge. If you require a quick boost, many chargers offer a rapid-charge function, often providing several hours of use from a 30-minute charge. Always use the manufacturer-approved charger, as off-brand alternatives may not regulate power correctly and can damage the sensitive batteries.
When Charging Fails: Common Issues and Solutions
If you place your hearing aids in the charger and the indicator light does not come on, first check the power source. Ensure the charging base’s cord is securely connected to both the charger and a functional wall outlet or power bank. If the base has a removable cord, try swapping it with another compatible USB-C or Micro-USB cord, as the cable is a common point of failure.
If the power source is working, the next frequent issue is a failure of the connection between the hearing aid and the charger. For contact-based chargers, gently inspect and clean the metal points on both the aid and the charger well with a soft, dry cloth or a small brush. Even a small piece of earwax can obstruct the electrical flow.
For both contact and inductive chargers, ensure the hearing aids are seated correctly in the wells, as improper placement prevents the charging cycle from initiating. If checking connections, cleaning contacts, and verifying the power supply fails, the issue may be a technical fault within the charger or the battery. Consult your hearing care professional or the manufacturer’s customer support for troubleshooting or service.