Myth about using a computer to charge your phone

Charging a phone battery using a USB cable and computer system can be frustrating due to the slow charging rate the computer sets for phone charging compared to charging it using a wall adapter and wall socket.

While USB charging could be slow and frustrating, it has some advantages over wall adapter charging.

Wall adapters usually deliver 5V at 1 amp, whereas computer USB ports generally provide 5V at 0.5 amp. With USB offering half the current, phone charging occurs at half the speed. This slower charging pace benefits lithium-ion battery life for several reasons:

1. Reduced Heat: Lower current results in less heat generated during charging, decreasing electrolyte degradation. Charging from a wall adapter often heats the phone noticeably, whereas charging from a computer tends to keep the phone cooler.

2. Enhanced Charge Retention: Slower charging typically allows the battery to retain more charge compared to fast charging methods.

3. Controlled Charging: The slower charging rate of a computer USB makes it easier to halt the charging process by around 80%, extending the battery’s cycle life significantly by avoiding full charging.