Power adapters for mobile telephones supply energy, measured in watts, to recharge the device’s battery. The wattage represents the rate at which electrical energy is transferred to the phone. For instance, a charger rated at 5 watts delivers energy at a slower rate than one rated at 20 watts.
The wattage rating is crucial for determining charging speed. Higher wattage generally translates to faster charging times, enabling a mobile telephone to reach full battery capacity more quickly. Historically, chargers offered lower wattage, leading to extended charging periods. As battery technology and power demands have increased, so too have the wattage capabilities of these adapters.