Wireless charging is less efficient than wired charging and can heat up a smartphone, accelerating battery wear, according to infohub.kz.
According to Engadget, Qi2-standard chargers lose up to 30% of energy compared with a cable. The heat they generate can cut a lithium battery's capacity by 12% over two years, and by as much as 25% in hot weather.
A cable delivers current directly, so the device heats up less and charges noticeably faster. For example, a new smartphone can reach half charge over a cable in 15 minutes, whereas via Qi2 it takes half an hour.
Experts stress that wireless pads are unsafe when used incorrectly. Placing a smartphone imprecisely on the pad weakens the magnetic connection, generating even more heat. Cases not designed for wireless charging also play a negative role: they trap heat inside the body, further heating the battery cell.
To extend battery life, experts advise combining both methods. During the day, it is convenient to use a wireless pad for quick top-ups, and at night to plug in a cable. It is also recommended to keep the charge level between 20% and 80% and to enable battery protection features in the smartphone settings.