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Views: 0 Author: Site Editor Publish Time: 2025-03-24 Origin: Site
Will non-wireless charging devices be affected when near a wireless charger?
First of all, electronic devices that do not have wireless charging are usually not significantly affected when they are near a wireless charger, but the following points should be noted:
1. Basic principles of electromagnetic field
The wireless charger transmits energy through electromagnetic induction, generating an alternating electromagnetic field. Devices that support wireless charging, such as mobile phones, have coils inside that convert electromagnetic energy into electricity. Non-wireless charging devices (such as regular mobile phones, keys, coins, etc.) lack a receiving coil to effectively absorb energy, so they are usually not charged.
2. Possible impacts and risks
(1) Slight heating of metal items
Phenomenon: Metal objects (such as keys, coins, metal-clad devices) may generate weak heat in electromagnetic fields due to eddy current effects.
Risk: The temperature is usually very low (far below the threshold of human perception), but placing large pieces of metal (such as metal phone cases) for a long time may cause slight local heating, and long-term contact should be avoided.
(2) Impact on magnetic stripe cards
Risk: Old credit cards and access control cards may be degaussed due to strong magnetic fields. Although the magnetic field strength of wireless chargers is usually low, it is recommended to avoid placing the magnetic stripe card directly on the charger for safety reasons.
(3) Electromagnetic interference of electronic equipment
General equipment: The circuit design of modern electronic equipment (such as smart phones, tablets) usually has the ability to resist electromagnetic interference, and the electromagnetic field intensity of wireless chargers is far lower than international safety standards (such as FCC, CE certification), so the impact on data storage or circuit function is minimal.
Special equipment: Very few older devices or devices sensitive to electromagnetism (such as certain medical implants, precision instruments) may be affected, but this is rare.
(4) Potential effects of batteries or circuits
Batteries: The batteries of non-wireless charging devices are not charged by electromagnetic fields, but if there is an unshielded circuit inside the device, a weak current may be generated, but usually not enough to damage the battery or circuit.
Data security: Modern storage media (such as flash memory) are highly resistant to electromagnetic fields, and the risk of data loss or damage is negligible.
3. Safety advice
Avoid placing magnetic stripe cards: Keep magnetic stripe cards away from wireless chargers to prevent demagnetization.
Reduce contact with metal items: keys, coins, etc., can be placed briefly, but avoid covering the charger for a long time.
Sensitive devices Note: Users of medical implants (such as pacemakers) should follow their doctor's advice and maintain an appropriate distance.
Children or pets: Avoid exposing children or pets to the charger for long periods of time to prevent accidental swallowing of small parts or burns (although the risk of fever is low).
Step 4 Summarize
When a non-wireless charging device is near a wireless charger, it usually does not cause significant damage or interference, but the above special circumstances should be noted. Just follow basic safety common sense and don't worry too much. If the device is abnormal (such as heating or abnormal function), remove it and check it.
