Putting a mobile phone in a microwave, regardless of whether it has a battery or not, is extremely dangerous and can have severe consequences. Here's what can happen:
With a battery: If you put a mobile phone with a battery into a microwave, the metal components of the phone, including the battery contacts and other conductive parts, can act as antennae and cause arcing (sparks) within the microwave oven. This arcing can potentially lead to a fire or damage to the microwave oven.
Without a battery: Even if you remove the battery from the phone before placing it in the microwave, it is still risky. Microwaves work by emitting electromagnetic radiation at a specific frequency that is absorbed by water, fats, and certain other materials. However, metal objects, including the internal components of a mobile phone, reflect and concentrate the microwaves rather than absorbing them. This can cause intense electrical currents within the phone, leading to melting, burning, or even an explosion, which can damage the microwave oven and pose a significant safety hazard.
In both cases, microwaving a mobile phone can result in a fire, release of toxic fumes, damage to the microwave oven, and potential harm to individuals nearby. It is essential to never put any electronic device, including a mobile phone, inside a microwave. If you need to dispose of a mobile phone, it is recommended to follow proper recycling and disposal methods outlined by your local waste management regulations.