The warning about not charging your phone under a pillow or on a bed is legitimate and based on real fire-safety concerns.

 

Here’s the simple reason:

• Phones and chargers naturally produce heat while charging.
• Soft surfaces like blankets, pillows, and mattresses trap that heat.
• Bedding materials are flammable.
• Damaged chargers, cheap cables, or faulty batteries increase the risk even more.

That combination can occasionally lead to:

• overheating,
• battery swelling,
• melted chargers,
• smoke,
• or, in rare cases, fires.

What firefighters recommend

Safer charging habits include:

• Charge phones on a hard, flat surface
• Keep them away from blankets and pillows
• Use certified chargers and cables
• Replace frayed or damaged charging cords
• Avoid covering the phone while charging
• Don’t leave overheating phones plugged in

Is overnight charging always dangerous?

Modern smartphones usually stop charging automatically when full, so overnight charging itself is not normally the main issue. The bigger concern is:

• poor ventilation,
• damaged accessories,
• counterfeit chargers,
• or charging in bed.

Best places to charge your phone

Good options include:

• a desk,
• table,
• countertop,
• or a nightstand with open airflow.

Warning signs to watch for

Stop using a charger or phone if you notice:

• excessive heat,
• burning smells,
• buzzing sounds,
• battery swelling,
• sparks,
• or discoloration around the charging port.

The overall message from firefighters is practical: phones are generally safe when used properly, but charging them in bedding or enclosed spaces increases fire risk unnecessarily.