A **fast charger** is a high-performance power adapter designed to significantly reduce the time it takes to replenish a device’s battery compared to standard charging blocks. By utilizing advanced protocols like **USB Power Delivery (USB-PD)** or **Quick Charge (QC)**, these chargers increase the voltage and amperage delivered to the device, often providing enough power to reach a **50% charge in 30 minutes or less**. Modern fast chargers frequently use **Gallium Nitride (GaN)** technology, which allows them to remain compact and efficient while managing heat better than traditional silicon-based chargers.