CanaKit 5V 2.5A Raspberry Pi 3 B+ Power Supply/Adapter (UL Listed)

Good quality, works very well. This adapter actually supplies exactly the amount of power my finicky Raspberry Pi 3 B+ needs. I have bought and returned other brand "Pi 3 B+" Power Supply Cables because they didn't actually provide the correct power load to the pi, causing the pi to either report "under voltage" or in some cases refuse to even boot; So I was so happy to find out that the CanaKit Raspberry Pi 3 B+ Power Supply cable actually worked correctly for my 3 B+. It has been such a nightmare to find a cable that actually provided the correct amount of power, I'm so glad I discovered this CanaKit cable because it actually works! I highly recommend this brand, and I know that I personally will never by from any other brand again.

Over the years there's been a lively discussion about the "proper" way to power Raspberry Pi computers. Some folks are purists that insist on Pi-approved power modules, lest you encounter boot-up or runtime instability signified by the dreaded lightning bolt icon, flashing LED, or low power warning message. Other folks are happy to try, and run with, generic (cheap) power modules that may have been included for free with other equipment, or sold for $5 at a convenience store. Will any micro-USB power brick do? Depends on whom you ask! If you want one less worry in your life, for not a ton of money, then this CanaKit is just the ticket. Its output is actually 2.5A rather than the more common 2A, so that's a bit of headroom. It runs cool and, being standard micro USB, has no connector problems. Along the line I've used it to power all of my prehistoric Pi's - models 1, 2, and 3. No issues.

Overall, a well made and well performing product. One thing though, it does not have an in-line switch, so you'll have to get a separate plug-switch if you want that functionality.

Has enough voltage to prevent the power errors I got from 2.4 usb jacks. It doesn’t have a power button, but it did the job I needed it to.

The attached image shows measured IV curves for this power supply compared to a 2.0A power supply (Kootek). I generated these with a RPi-based IV curve tracer that I built for solar panels (search for "IV Swinger" on YouTube and/or GitHub if you're interested in knowing more about it). It's not intended for such small voltages, but it worked pretty well. The IV curves show the current (I) and voltage (V) for different resistances (R). This tells the story about how the supply delivers power for different loads (power = I * V). You can see that both supplies have an open-circuit voltage of 5.3V. That is the lower rightmost point. R = ∞Ω, I = 0A, P = 0W. The upper left points of each curve are the closest to R = 0 (short circuit) that we can measure (R = 0.94Ω due to wiring resistance). You can see that the Kootek delivers just about 3A of current and the Canakit delivers about 3.8A. But at this point both are way below 5V (below 3V, in fact.). An interesting point is where the curves cross their rated current values. The Kootek 2.0A supply crosses 2.0A at about 4.6V (2.0*4.6 = 9.2W). The Canakit 2.5A supply crosses 2.5A at about 4.5V (2.5*4.5 = 11.25W). Both of these are well below 5V. Probably high enough that the RPi won't crash, but cutting it close. Another interesting point is where the curves cross 5.0V. The Kootek 2.0A supply crosses 5.0V at about 0.8A (0.8*5.0 = 4.0W). The Canakit 2.5A supply crosses 5.0V at about 1.0A (1.0*5.0 = 5.0W). People who are claiming that this supply doesn't deliver 2.5A are correct - if they are expecting it to deliver 2.5A at 5.0V. But what is important is whether the supply is sufficient for the RPi 3. All I can say for sure is that it does deliver proportionally more power than a 2.0A-rated power supply that has worked fine for me with the Gen 1 RPi B+. For that reason, I'm giving it four stars. For anyone with specific voltage requirements at the rated (or other) current, you can read the values off the IV curve in my attachment.

Note: if laying the board on a desk, the circuit board should be at the top (where you can see the LED flash from time to time). There's a brief manual at the manufacturers (Nova) site. The recent smoke events in the NE US got me researching air quality sensors. My research lead me to learning about sensor components and then on to researching if I could use a sensor with a Raspberry Pi. I own a Raspberry Pi 3 which has been "resting" in a drawer for a few years... More research and I learned how I could use the Pi with this sensor. So, I ordered the sensor. I followed the directions I found and was able to get the system to work. I wasn't sure it was accurate, so last evening, as the AQI was rising, I put it all on my front porch and the initial reading just so happened to match the EPA sensor a few miles away. Good sign. The readings bounced around a bit, as I would expect and I brought it back inside. My purpose is to measure my inside air especially during outside smoke "events" to know what is happening and to measure if countermeasures (air cleaners, their location, etc) are working. As a test, I did run my vacuum cleaner near the sensor and it detected an increase in PM10. The increase in PM2.5 could have been a "rounding error." Finally, a comment about accuracy in more humid environments. As humidity increases, the amount of dust that can be suspended in air increases. Turn on the A/C, the dust in the air decreases because there's less water molecules in the air to support that dust. That this device is detecting less dust in the air after the A/C is turned on is a sign that this device is working.

Previous one burned on a 400+ Volts over voltage incident. Replacement does it work just fine.

Perfect for the application. Extra power is obvious when monitoring the Rasp Pi.

Realmente no hay mucho que decir, cumple su función, a penas lo he tenido por una semana y en ese tiempo no he notado que se sobrecaliente.

Conforme à la description et rapidité de livraison

Wrong one I order

Para mi fue el adecuado, se dice que se puede utilizar cualquiera hasta el de un teléfono celular, mejor utilizar uno propio para la Pi.

El cable no es la gran cosa, lso materiales son normales y el desempeño, de a cuerdo a lo esperado, la parte imoortante a resaltar es que funciona correctamente el diapositivo, es decir, el raspberry tequiere de este voltaje para operar de manera correcta; y eso es lo que se obtiene. Me parece un poco costoso para la naturaleza y uso del accesorio, sin embargo comprendo que cumple unrequerimiento por demás específico. Llegó en tiempo y forma, Amazon Prime siempre ha sido confiable.