I tried a dozen different cables and charging bricks in my house with the same rating and always got power issues with the RPi, but this worked perfectly and never gave me power issues from the moment I started using it. It SHOULDN'T matter since I used the same power adapters, but for whatever reason for me, it did. So I'd pretty much HAVE to recommend.
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This item: CanaKit 5V 2.5A Raspberry Pi 3 B+ Power Supply/Adapter (UL Listed)
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This Item  CanaKit 5V 2.5A Raspberry Pi 3 B+ Power Supply/Adapter (UL Listed) | Recommendations ![[5V 3A UL Listed] iUniker Power Supply for Raspberry Pi 3, Power Supply for Raspberry Pi MicroUSB Power Supply with on/off Switch Compatible with Raspberry Pi 3/ 3b+/ Zero/Zero 2w](https://m.media-amazon.com/images/I/41lYLFAVkjL._AC_.jpg) |  | ![iUniker 20W 5V 4.0A Power Supply for Raspberry Pi 4/ Orange Pi 5&5B, UL Listed Type C Power Supply with ON/Off Switch for Raspberry Pi 4 Model B 8GB/4GB/2GB/1GB[UL Listed]](https://m.media-amazon.com/images/I/41Jua9JszML._AC_.jpg) |  | |
| Price | $9.95 | $8.99 | $19.99 | $9.99 | $8.99 |
| Delivery | Get it as soon as Monday, Dec 2 | Get it as soon as Monday, Dec 2 | Get it as soon as Monday, Dec 2 | Get it as soon as Monday, Dec 2 | Get it as soon as Monday, Dec 2 |
| Customer Ratings | |||||
| Sold By | CanaKit | iUniker Pi | O.T. US | iUniker Pi | ENOKAY |
| connector type | usb, micro usb | micro usb | Micro USB Type B | USB Type C | usb, micro usb |
| number of usb ports | 1 | 1 | 1 | 1 | 1 |
| compatible devices | Raspberry Pi 3 B, Pi 3 B+, Pi Zero / Zero W | — | AC-DC Converters | Raspberry Pi 4 Model B 8GB/4GB/2GB/1GB | Raspberry Pi 2, 3, B+ |
| input voltage | 240 volts | 240 volts | 110 volts | 240 volts | 240 volts |
| connector gender | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male | male to male, Male-to-Male |
| power source | Corded Electric | Corded Electric | Corded Electric | AC | Corded Electric |
| specification met | ✗ | UL | FCC | RoHS, CE, UL Listed | ma |
| output voltage | 5 volts | 5 volts | 5.1 volts | 5.25 volts | 5 volts |
| cable length | 5.0 feet feet | — | 150 centimeters centimeters | — | 100 centimeters centimeters |
| current rating | 0.5 amps, 2.5 amps | 3 amps | 0.5 amps, 2.5 amps | 4 amps | 2.5 amps |
From the manufacturer
CanaKit 5V 2.5A Raspberry Pi 3 Power Supply / Adapter / Charger
The CanaKit 2.5A Raspberry Pi power supply differs from typical standard 5V USB power supplies in the market in that it can deliver a full 2.5A and still output a voltage well within the USB minimum voltage specifications. This adapter has been incorporated as an inline noise filter for highest stability and reliable operation.
The power supply still has about 0.5A of output power to spare, so even at the maximum current supported by the Raspberry Pi 3, the power supply is not at it's absolute maximum. It is also ideal for use by anyone over-clocking the Raspberry Pi which causes higher power requirements that a lower power adapter may not be able to supply. With this power supply, you can power the Raspberry Pi 3 at full load as well as up to 1.2A across the four USB ports.
- This adapter has been specially designed and tested for the new Raspberry Pi 3.
IV Curve
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.
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Hasta ahora no he tenido inconvenientes
Reviewed in Mexico on July 28, 2018