Putting car keys in the microwave is not a common or recommended practice. However, there have been instances where individuals have attempted to use a microwave to try and charge or boost the signal of their car's key fob. This practice is often associated with a misconception or misunderstanding of how key fobs work.
Key fobs for cars are electronic devices that use radio frequency (RF) signals to communicate with the car's locking and unlocking system. The key fob emits a specific RF signal when you press its buttons, and the car's receiver picks up this signal to perform the requested action, such as unlocking the doors or starting the engine.
The idea behind putting a car key in the microwave is based on the belief that microwaves can somehow recharge the battery inside the key fob or boost its signal. However, this belief is incorrect and potentially dangerous for the following reasons:
Damage to the key fob: Microwaving electronic devices, including car key fobs, can cause severe damage. Microwaves generate high-frequency electromagnetic fields that can disrupt and permanently damage electronic components, rendering the key fob useless.
Fire hazard: Placing metal objects like car keys inside a microwave can create sparks and lead to a fire. Many car keys contain metal components, such as the key blade or the keyring, which can cause problems in the microwave.
Battery safety: Attempting to recharge a key fob battery using a microwave is not an effective or safe method. Car key fob batteries are typically small lithium coin or button cells that cannot be recharged in this manner. In fact, microwaving a key fob battery can be hazardous and may lead to an explosion or leakage of harmful chemicals.
In conclusion, microwaving car keys is not a recommended or sensible practice. If your car key fob is experiencing issues, the best course of action is to replace the battery with a new one or consult the car manufacturer or a professional locksmith for assistance.