Use a 5V USB-C power supply for Raspberry Pi 4 and Raspberry Pi 5
Use a 5V micro-USB power supply for older models such as Raspberry Pi 3 and earlier
Choose a power supply with sufficient current for your model
Connect the power supply directly to the Pi’s power port
Use a powered USB hub for peripherals if needed
Use a PoE HAT with a compatible PoE-capable Raspberry Pi and network switch
Use a battery pack with a stable 5V output
Use a UPS HAT or battery HAT for backup power
Use a GPIO power input only with proper regulation and wiring
Avoid underpowered adapters and low-quality cables
Use a short, thick cable to reduce voltage drop
Verify the power LED or system status after connecting power