Designed specifically for the Raspberry Pi 4, the CanaKit Raspberry Pi 4 Power Supply has precisely the correct specifications to deliver a clear and steady power source: 18 Watt 5.1V / 3.5A output. It is a little higher than the official Pi 4 power supply, which makes it a strong option for products that require a little more juice for HATs or a particularly power-hungry screen. Additionally, CanaKit has included a noise filter in the unit for a welcome boost to stability. It’s also UL listed, so you get the quality assurance that comes from UL’s officially tested and verified stamp of approval. The GeeekPi Raspberry Pi 4 Power Supply with On/Off Switch is well served with multi-protection features, including over-voltage protection, under-voltage protection, temperature protection, over-current protection, and short circuit protection. It also has FCC, TUV, and RoHS certifications, guaranteeing a tried and tested product fit for purpose. If secure-boot is enabled then the processor revision (B0/C0) and signed-boot status flags are displayed. Otherwise, this line is blank. Master Python on Raspberry Pi: Create, understand, and improve any Python script for your Raspberry Pi. Learn the essentials step-by-step without losing time understanding useless concepts. Don't power up your Raspberry Pi with any old cable! This is a task that you will need to be mindful of as some models are very stringent in their required input.

While it may be tempting to fish out any old USB charger you have lying around, we’d warn against it. If the specifications don’t align with the requirements of the Pi 4, notably the voltage requirements, or the charger is of poor quality, doing so may cause irreparable damage to the Pi board or, worse, start an electrical fire. Or slightly less daunting and more common, it won’t provide sufficient power for the mini-computer to work correctly, coughing up a bevy of errors and performance issues and causing all manner of hair-pulling frustration.

Delivery

Power can be supplied to the Pi by connecting 5V to pin 2 or 4 of the 40-way connector, with "ground" (0V) connected to pin 6 or pins 9, 14, 20, 25, 30, 34, 39. UPDATE: The dodgy non-compliant USB-C power port issue described in this link which has been now been fixed.

So either better cabling or higher voltage. Pi can easily work with 5.6V: when idle, RPi 4 takes around 0.8A with SSD connected to USB3 directly – when under full stress (i.e. CPU 100% – all cores and full write to SDD) it will very fast get into 2.2A. And I am talking headless (no display) Pi 4B. Voltage not 5V which can kill your device. Often, when they are under load voltage starts to drop, or they emit excessive heat. Third-party USB-C charging devices can be cheaply wired, potentially destroying connected devices as well as starting fires. A safer alternative is to power your Pi using PoE which beyond reducing these risks, offer additional benefits: Benefits: CharlyDelta reported getting 10 hours of run time from that setup. Your runtime will depend on your load. We offer a range of Raspberry Pi boards, some of which may require different power supplies. For example, the Raspberry Pi 3 power supply is rated at 5V @ 2.5A and it is recommended for the Raspberry Pi 3B+ as a minimum for stability. Why's that? While how much current (mA) it requires is dependent on what you hook up to it or what it is used for, a 5V @ 2.5A power supply is sufficient for most applications, including the use of its 4 USB ports.

Can they be interchanged? Maybe, and honestly, I don't care. Use chargers for charging, power supplies to supply power.