To function properly, the Raspberry Pi 4 typically requires a power supply that provides 5V with a current of at least 3A, totaling a minimum power of about 15.3W. It is crucial to use a reliable power source to avoid issues like under-voltage warnings or unexpected shutdowns, especially when using peripherals or running demanding processes.

You can get a 5ft (1.5m) Official Power supply USB-C from this link.