Best answer: The Raspberry Pi 3B+ uses about 400 mA while idle but this can increase dramatically under load. It's recommended to use a high-quality 2.5 Amp power supply.
Amazon: CanaKit Raspberry Pi 3 B+ Power Supply ($10)
Clean and constant power is important
It might not look like it, but the Raspberry Pi 3 B+ is a computer just like any desktop or laptop. That means it needs clean and consistent power to keep things up and running. The 3 B+ uses a bit more power than any previous models, and according to Raspberry Pi Foundation COO James Adams, this is due to the faster processor, Gigabit Ethernet, and dual-band wireless.
Adams recommends a high-quality 2.5 Amp power supply be used. CanaKit is an official reseller of Raspberry Pi parts and accessories and offers the correct power supply for just $10.
A high-quality 2.5 A power supply is a must.
The Raspberry Pi 3 B+ requires clean and stable power, and the official power supply is designed to provide both. CanaKit is an official reseller of Raspberry Pi parts and accessories and you can get exactly what you need for just $10.
