How do you protect your wearables from dust and moisture when wireless charging?

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Wireless charging is a convenient way to power up your wearables without plugging in any cords. But did you know that environmental factors like dust, moisture, and temperature can affect the performance and safety of your wireless charging devices? In this article, we'll explain how these factors can impact wireless charging and what you can do to protect your wearables from potential damage.

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Shivangi Jaiswal

Android Engineer | Kotlin, Java | Jetpack Compose | TDD | CI CD | MVVM
Kyle Richards

Event Manager @ The Customer Connect Expo

1 Dust and dirt

Dust and dirt can accumulate on the surface of your wireless charger and your wearable device over time. This can create a layer of resistance that reduces the efficiency and speed of wireless charging. It can also cause overheating, short-circuiting, or fire hazards if the dust and dirt get inside the charger or the device. To prevent this, you should regularly clean your wireless charger and your wearable device with a soft cloth or a brush. Avoid using any liquids or chemicals that might damage the components. You should also store your wireless charger and your wearable device in a dry and clean place when not in use.

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Shivangi Jaiswal

Android Engineer | Kotlin, Java | Jetpack Compose | TDD | CI CD | MVVM
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Start by designing a user interface that notifies users when their device is securely docked, incorporating visual indicators for active sealing. Utilize sensors, like accelerometers, to detect when the wearable is placed in the dock, automating the sealing process for a smoother experience. Implement smart battery management to minimize heat during charging, optimizing power usage with background services. Collaborate with hardware engineers to ensure the wearable uses materials that meet water and dust resistance ratings.

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Kyle Richards

Event Manager @ The Customer Connect Expo
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IP Ratings: Choose wearables with high IP (Ingres Protection) ratings that indicate resistance to dust and water. Use Protective Cases: Consider using cases or covers specifically designed for your wearable that offer additional protection against environmental elements. Wireless Charger Design: Ensure your wireless charger has a sealed design to prevent dust and moisture ingress. Clean Environment: Place the charger in a clean, dry area, away from sources of moisture like sinks or showers. Avoid Charging in Wet Conditions: Never charge your device when it is wet or in humid environments to prevent damage. By implementing these measures, you can help extend the life of your wearables.

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Rafael Schaider Bastos

Founder & CTO of BelleHealth.co | FemTech | Wearables | Women's Health Tech Ambassador
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From my experience developing smart rings, I’ve seen how dust can infiltrate miniaturized devices, compromising functionality. As engineers, it's crucial to design enclosures with tight seals and consider materials that repel dust. Implementing gaskets or dust filters can also be beneficial in protecting the sensitive internal components from contamination.

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2 Moisture and humidity

Moisture and humidity can also affect wireless charging by creating corrosion, rust, or mold on the metal contacts of your wireless charger and your wearable device. This can impair the electrical conductivity and the quality of wireless charging. It can also cause short-circuiting, water damage, or electrocution if the moisture and humidity get inside the charger or the device. To prevent this, you should avoid using your wireless charger and your wearable device in wet or humid environments, such as bathrooms, kitchens, or outdoors. You should also wipe off any moisture or condensation from your wireless charger and your wearable device before and after wireless charging. You should also check the water resistance rating of your wireless charger and your wearable device and follow the manufacturer's instructions for proper care.

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Rafael Schaider Bastos

Founder & CTO of BelleHealth.co | FemTech | Wearables | Women's Health Tech Ambassador
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Every material has some degree of permeability to humidity, but selecting materials with lower humidity intake is key. Consider using a sandwich structure: an external coating that's gentle on the skin and water-resistant, paired with an internal layer with very low humidity permeability to protect the circuitry. This dual-layer approach can significantly enhance moisture protection.

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3 Temperature and heat

Temperature and heat can also affect wireless charging by altering the battery capacity and the charging efficiency of your wireless charger and your wearable device. Wireless charging generates heat as a by-product of the electromagnetic induction process. This heat can increase the temperature of your wireless charger and your wearable device, especially if they are enclosed in a case or a cover. High temperatures can reduce the battery life and the charging speed of your wireless charger and your wearable device. They can also cause overheating, swelling, or explosion if the temperature exceeds the safety threshold. To prevent this, you should avoid using your wireless charger and your wearable device in hot or sunny environments, such as near a window, a radiator, or a fireplace. You should also remove any case or cover from your wireless charger and your wearable device before wireless charging. You should also monitor the temperature of your wireless charger and your wearable device and stop wireless charging if they feel too hot.

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Rafael Schaider Bastos

Founder & CTO of BelleHealth.co | FemTech | Wearables | Women's Health Tech Ambassador
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Miniaturized circuits in wearables are particularly vulnerable to heat. Utilize materials with good thermal conductivity to dissipate heat effectively. Integrating temperature sensors within the wearable can provide real-time monitoring, ensuring that the device remains within safe operating temperatures and automatically adjusts charging rates if overheating is detected.

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4 How to choose a wireless charger

When choosing a wireless charger to suit your needs and preferences, you should consider compatibility, power, and design. First, make sure that your wireless charger and your wearable device support the same wireless charging standard such as Qi, PMA, or AirFuel. Then check the output power of your wireless charger and the input power of your wearable device to optimize charging efficiency and avoid wasting energy. Lastly, select a wireless charger that fits your space and style. There are different designs of wireless chargers available such as pads, stands, docks, or mats. You can also choose a wireless charger with features like LED indicators, cooling fans, or safety protections.

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Rafael Schaider Bastos

Founder & CTO of BelleHealth.co | FemTech | Wearables | Women's Health Tech Ambassador
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When designing wireless chargers, focus on features like dust and moisture resistance and temperature control. Opt for materials that are not only durable but also provide effective insulation. Chargers should be compatible with the wearables’ design, ensuring proper alignment and secure charging without risking exposure to environmental factors.

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5 How to use a wireless charger

Once you have selected a wireless charger that meets your needs and expectations, you can begin using it to charge your wearables. To ensure proper use, place the charger on a flat, stable surface away from any metal objects and magnets. Plug the charger into a power outlet or USB port with the cable and adapter provided by the manufacturer. Align your device with the center or marked area of the charger, making sure there is no gap or obstruction between them. Listen for a confirmation sound or light from the charger or device to indicate that charging has begun. Leave your device on the wireless charger until it is fully charged or until you need to use it. Avoid touching or moving either during this time. Unplug the charger from the power source when not in use or when traveling.

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Rafael Schaider Bastos

Founder & CTO of BelleHealth.co | FemTech | Wearables | Women's Health Tech Ambassador
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A completely isolated transmitter and receiver coil setup is key for a reliable system, ensuring a known distance between the coils for consistent wireless charging. To achieve correct positioning, it's common to use magnets and housing mechanical dents that align the device to the charging case. This approach ensures perfect alignment and consistent current transfer throughout the device's lifespan.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Rafael Schaider Bastos

Founder & CTO of BelleHealth.co | FemTech | Wearables | Women's Health Tech Ambassador
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Beyond basic environmental protections, consider the overall build quality and the integration of smart features. For instance, incorporating sensors that detect and alert users to dust or moisture intrusion can preempt damage. As wearables continue to shrink in size, ensuring that every component, from the material choice to the charger design, contributes to a robust and reliable user experience is paramount.

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How do you protect your wearables from dust and moisture when wireless charging?

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1 Dust and dirt

2 Moisture and humidity

3 Temperature and heat

4 How to choose a wireless charger

5 How to use a wireless charger

6 Here’s what else to consider

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