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A wireless charger works by transferring energy from a charging base using electromagnetic induction. The device being charged is placed on the charging base, which transmits an electromagnetic field that induces an electrical current in the device, allowing it to charge.
Yes, you can leave your phone on a wireless charger overnight. However, it's important to keep in mind that the battery should not be left on the charger for too long. Overcharging can cause damage to battery life and may even lead to a decrease in battery capacity.
Yes, wireless chargers use a few watts of electricity when not charging. This is because the charger needs to remain powered on to detect when a device needs to be charged. That way, when a device is placed on the wireless charger, it can immediately begin providing power.
Wireless charging happens through electromagnetic induction, which indeed may damage your magnetic credit card if you store it in a cardholder adhered to the back of your phone or a wallet case. To avoid possible damage, it’s best to remove any cards before you start wireless charging.
If you put a non-wireless charging phone on a wireless charger, nothing will happen. There is no circuitry inside that phone to detect the magnetic waves generated by the wireless charger. A non-wireless charging phone won’t charge wirelessly unless it has a wireless charging case or adapter.
To find out whether your phone has Qi wireless charging, check your phone's manual or technical specifications online. Most wireless chargers are compatible with any device that is Qi-enabled, so if your phone has that symbol, it is likely compatible.