USB connector types multiplied as the specification progressed. The original USB specification detailed standard-A and standard-B plugs and receptacles. The connectors were different so that users could not connect one computer receptacle to another. The data pins in the standard plugs are recessed compared to the power pins so that the device can power up before establishing a data connection. Some devices operate in different modes depending on whether the data connection is made. Charging docks supply power and do not include a host device or data pins, allowing any capable USB device to charge or operate from a standard USB cable. In a charge-only cable, the data wires are shorted at the device end, otherwise, the device may reject the charger as unsuitable. The device combines multiple power output ports and may become a true life savior for all of your gadgets. Finally, many multiple USB chargers operate similarly to the average surge protector. They protect your devices from unexpected power surges and prevent them from being damaged using overcharge protection.
Likewise, for the same battery a charge current of 250 mA corresponds to a C-rate of C/2, meaning that this current will increase the state of charge of this battery by 50% in one hour. Both devices must support USB 3.0 to take advantage of the cable’s faster transfer rate. Both devices must support USB 3.1 to take advantage of the cable’s faster transfer rate. USB-C data cables are best suited for data connections between a USB-C device and another USB device. Check your devices to see if they both support USB 3.1 Gen 1 or USB 3.1 Gen 2 . They can also be used to charge, but do so at the same rate as cheaper USB 2.0 cables.
I have one in my aforementioned wall adapter and another in my car. RAVPower appears to have a different design philosophy than Aukey when it comes to exceeding its rated wattage. Where the Aukey chargers we tested could sustain wattages above their advertised maximums, RAVPower units could hit higher peaks, but then would shut themselves down after a few minutes. For example, the Pioneer RP-PC133 outputted an epic 73.7 watts (19.5V, 3.78A) on the USB-C port alone, but it didn’t last long. Better still, the Omnia PA-B4 offers up to 15 watts of juice from its second USB-C port , which is more than enough to charge a second device or comfortably power a Raspberry Pi 4. The primary port will emit less power, however, if a second device is plugged in. In our case, we pushed the primary port 50 watts under those conditions, though Aukey only advertises a maximum of 45 watts. Aukey’s 27W USB-C Power Delivery charger is a single-port adaptor that ticks all our boxes if you’re concerned with charging only one device.
This is most common on laptops that come with their own proprietary charger — although a number of laptops can be charged either way, only the propriety charger tends to power up a laptop more quickly. The Samsung Notebook 9 is an example of that, as is the 2019 HP Envy 13. If you’re not sure exactly how to charge your laptop, check the manufacturer’s website, or look up a review of the system here at Digital Trends. In most cases, I ran at least two runs per charger per product and averaged them together if they came within a reasonable percentage of each other. The asterisk indicates dual-port chargers that were charging with a cable for the laptop and a cable for the iPhone simultaneously. They’re made for the PS Vita (which apparently won’t charge at all from the low amperage levels of data connections), but they’ll work for any USB device.
The 60W Charging Station offers one USB-C port for fast charging and four USB-A ports to work with anything you throw at it. One of the few downsides is that there is nowhere to put said devices, as you will just need to plug in the cables and set the smartphones or tablets on the desk or table. Despite this, it’s a compact, useful device that comes in at a good price. If you are looking for a way to keep all of your devices charged up without having absolute chaos, then the Satechi Charging Station Dock is our favorite of the bunch. This dock can charge everything you throw at it, including the new iPad Pros and MacBooks. The great thing about the best USB charging stations is that there are so many different options available, and here are some of the best. You will also want to watch your USB-C power mode, which you can find in your laptop settings, usually in the power/battery section. Here, you may find that you can switch Type-C’s output, choosing whether to receive power or send power.
Odds are, you probably have multiple gadgets that need recharging. Why not charge them all simultaneously with this nifty adapter from Anker? It pushes out 43.5 watts of power — that’s three times more than the brick that was likely included with your iPhone. We compared 40 different USB wall chargers to compile this list of the best third-party and multi-port offerings available right now. The very small USB port found on many non-Apple cellphones, tablets and other portable devices is a Micro USB socket. Considerably smaller than USB Type A and B, Micro USB is also half the thickness of Mini USB . Micro USB has been superseded by USB Type C on many new products.
Most multiple USB port chargers have become quite affordable and practical additions to any high-tech home or office. However, there are some that could stretch the limits of your wallet. Always ensure that you don’t buy something that reaches beyond your intended use. And if you’re just driving across town, the faster your phone charges, the better. If you own a QC 2.0 device, however, ask yourself if paying extra for a QC 3.0-capable charger is worth it. Without fancy testing equipment, it can be hard to gauge whether you’re getting what you paid for.
The right images show the low-frequency information on the output voltage. This charger is a counterfeit of the Apple UK iPhone charger. They’ve removed Apple from the text, but left Emerson Network Power, which I’m sure is not the actual manufacturer. The genuine Apple UK charger can be distinguished by a serial number inside the USB connector. The Monoprice charger isn’t a USB charger, but instead has a 30-pin iPhone dock connector attached. The photo above shows a real iPad charger and a counterfeit . The counterfeit has almost identical text, but without “Designed by Apple in California. Assembled in China”, “Listed” under UL, and the manufacturer “Foxlink”.
Modern laptops no longer need a big power brick — you can just use USB-C. If you’re looking for the best USB C charger, read on to see which of the tried and true devices below will charge best for you. You might think that all chargers are created equally, but nothing could be further from the truth. Wired explains that picking the right charger with the right amperage can mean the difference between getting your phone charged while you work versus waiting all day before you can unplug it. A new generation of chargers with Gallium Nitride semiconductors are way better than the power brick which came with your laptop. We benchmarked popular models to find the best USB-C laptop charger for you. However, if it’s not pulling close to the maximum — as laptops rarely do — the charger will be quite a bit cooler. When we pulled just 65 watts, the Aukey Omnia PA-B5’s temperature hit just 119 degrees Fahrenheit, which is in line with what the coolest 65-watt chargers.
The Nekteck also comes with a USB-C–to–USB-C cable, making this low-priced model an even better value. Compared with the familiar USB-A port, the smaller USB-C port can charge most modern phones faster (if you’re using the right cable) and can even charge tablets and laptops. And the Nekteck PD 45W Type-C Car Charger provides the best of both worlds. This Nekteck charger’s 45-watt output and included USB-C–to–C cable also support the maximum charge rate on Android phones , the 2018 and 2020 iPad Pros, and even many laptops. And you can use the 12-watt USB-A port at the same time to charge a second phone or other device with any USB cable you already have. The well-crafted alloy exterior of the TECHKEY car charger is scratch-resistant and allows better dissipation of heat. This charger has dual charging technologies to support different charging platforms like Power Delivery 3.0 and Quick Charge 3.0. Given its design and superior build quality, it is more efficient than traditional chargers.
The microprocessor then sets the battery charger to the correct parameters. When it comes to the best USB charging stations, you can’t get much better than the Satechi Charging Station Dock. The fact that it features five standard USB ports and two USB-C ports is appealing enough as it is. There is even an LED light to let you know when your devices are being charged. However, if you are hoping for some Quick Charge support, you’ll need to look elsewhere. Plus, there is no dedicated On/Off switch to turn it off when all of your devices are ready to go.
A second problem is the output voltage can be affected by the AC input, causing 120 Hz “ripple”. Third, the charger is supposed to provide a constant voltage. A poor design can cause the voltage to sag as the load increases. Your phone will take longer to charge if the charger doesn’t provide enough power. Finally, USB chargers are not all interchangeable; the wrong type of charger may not work with your device. Since these currents are larger than in the original standard, the extra voltage drop in the cable reduces noise margins, causing problems with High Speed signaling. To charge your USB devices, simply connect the four-foot power cord’s NEMA 1-15P plug to an AC power outlet, and connect your devices to the available USB ports. The unit protects against overheating, overcurrent and overcharging—in fact, it stops charging as soon as your devices’ batteries are at full capacity.