Is it safe to use phones and laptops while charging?

Most current models use lithium-ion batteries, which can theoretically catch fire or explode if overcharged. However, manufacturers have implemented automatic cut-off systems that stop charging once the battery reaches 100%. After that point, electricity flows directly to the device, bypassing the battery.

According to battery resource site Lesy-battery, incidents involving phones or laptops overheating or exploding during extended charging, such as overnight use or charging while operating, are rare. This is due to protective circuitry in chargers and power adapters that regulate voltage and current.

Some manufacturers have introduced additional smart features. Apple devices, for instance, may pause charging at 80% during overnight sessions and resume closer to morning to preserve battery health. High-performance laptops and gaming phones are even designed to remain plugged in during intensive use.

Despite these improvements, risks still exist and are often linked to user behavior. In rare cases, design flaws in batteries or power systems have led to recalls. Samsung’s Galaxy Note 7 was withdrawn from global markets in 2016 due to a defective battery compartment that posed explosion risks.

A more common danger stems from the use of uncertified or low-quality accessories. Generic chargers often lack key safety components, such as thermal protection and current stabilizers.

Devices that support fast charging also require compatible, high-quality cables. Using substandard accessories while charging overnight or during use can increase the risk of overheating and fire.

Users are also advised to avoid charging devices in hot environments. Apple and Samsung recommend operating temperatures between 0 and 30 degrees Celsius. Charging in poorly ventilated areas or placing devices under pillows or blankets can trap heat and increase danger.

Older electronics, particularly those over five years old or with degraded batteries, are more vulnerable to overheating. Batteries that lose charge quickly or show signs of swelling should be replaced at authorized service centers. Worn-out batteries can slow performance and raise internal temperatures during use.

Technology expert Vu Trong Minh says charging while using a phone or laptop is not inherently dangerous.
Manufacturers have accounted for this usage and do not prohibit it. However, he adds that risks can arise when poor-quality chargers, high temperatures, or defective hardware are involved.