how to power raspberry pi 5 with battery？

The Pi 5 is a bit power hungry compared to older models — it wants 5V/5A officially, so you can't just slap any power bank on it and call it a day.

The easiest route is a dedicated UPS HAT. DFRobot makes one specifically for the Pi 5 (FIT0992) that takes 2x 18650 batteries and outputs a stable 5V up to 5A. It sits underneath the Pi with pogo pins, so no extra cables needed. You get power management features too — auto shutdown when battery is low, I2C battery monitoring, seamless switch between wall power and battery. People say it can run a Pi 5 for up to 10 hours depending on load.

If you don't need the UPS features and just want portable power, a good USB-C PD power bank that supports 5V/5A output works too. Just make sure it actually negotiates 5A — a lot of power banks cap out at 3A, which can cause brownouts under heavy load.