The two additional USB-A ports take advantage of Anker’s PowerIQ technology to ensure the best charging speeds for other devices. Yes, USB-C power is pretty great — except that nearly every airline seat, coffee shop, airport lounge and hotel room now seems to be equipped with those old-fashioned USB-A charging ports. That’s why it never hurts to keep some adapters on hand for your device. The Elebase dongle shown above includes an integrated keychain that keeps it attached to the main cable. Not exactly elegant, but it gets the job done — at $9 per pair. While I, too, lack an EE degree – is it just me, or is the methodology employed for this articles’ tests a flawed one? If a charger had dual ports, we plugged one port into a USB-C phone while we used the other with the load tester.
The iPhone charger performs extremely well at filtering out spikes and noise, the best of the chargers I measured. Apart from the 120 Hz spikes, the noise spectrum is flat and very low. The power quality is so good, I checked the results several times to make sure I wasn’t missing something. The Motorola charger has the lowest listed power output, 850mA. The back of it has a holographic sticker , which may ward off counterfeiters, even though it’s unlikely for anyone to counterfeit this charger. I wonder though why Apple doesn’t use holograms or other anti-counterfeiting techniques, given the large number of counterfeit Apple chargers being sold. Counterfeit chargers pose a safety hazard as well as a hazard to your phone. You can buy a charger that looks just like an Apple charger for about $2, but the charger is nothing like an Apple charger internally. But more importantly, these chargers ignore safety standards. Since chargers have hundreds of volts internally, there’s a big risk if a charger doesn’t have proper insulation.
There are many standards for energy consumption; see 5 W Cellular Phone CCCV AC-DC Adapter. For Energy Star ratings, a 5W charger must have under .5W no-load consumption, and 63% efficiency under load. A 10W charger must have under .75W no-load consumption, and 70% efficiency. Photo of PMP W cube charger used with permission from Texas Instruments. TI has an interesting new design for a 10 watt inch-cube charger. With this design a tablet charger could be as small as the iPhone charger.
Conserve the lifetime of your battery by disconnecting when fully charged. Leviton has been at the forefront of developing electrical products with your safety in mind for over a century and our outlets with USB ports are no exception. Keeping your smartphones, tablets and other electronic devices up and running is essential to staying connected to family, friends and business. Whether you have one device or many, we have a Leviton USB outlet that is right for you. This was the standard for various devices a while back but was quickly replaced by the micro-USB connector mentioned below. You’ll find it on older models of various gadgets especially cameras, MP3 players, and game controllers, among others. As its name suggests, it’s smaller than a regular USB, but larger when compared to its successor. If you’ve ever needed to charge anything, from smartphones to tablets, to cameras and even new laptops, you’ve likely needed to use one. However, USB cables come in different shapes and sizes despite the fact a lot of them do the same things. In this short and handy guide, we’ll take a look at all the different types of USB cables available on the market and give you some examples where you might find them in use.
While most chargers meet or exceed the power rating, there are some exceptions.The counterfeit chargers perform extremely poorly, putting out a fraction of the expected power. Charging your device with one of these chargers will be a slow, frustrating experience. In particular, the counterfeit UK charger only produces a third of the expected power. Although the label claims the charger works on volts, it’s clearly not designed to work on US power. The plug can be removed and replaced for use in different countries, similar to the iPad and HP TouchPad chargers. I couldn’t find any UL safety approval on this charger, but I did find a report of one catching fire. People often wonder how much power their charger is wasting while it’s idle, and if they should unplug their charger when not in use. I measured this “vampire” power usage and found the chargers varied by more than a factor of 20 in their idle power usage.
If you have ever discovered that your electronic device loses its charge over a short time, then you are most likely using a charger that provides insufficient power to that device. Just about every piece of mobile tech these days requires a USB wall charger, so having an extra one around is always a great idea, especially since Apple and Samsung don’t include one with their newest smartphones. Our picks are much more powerful, affordable, and likely faster at recharging all your devices than the charging brick that you’re currently using. Most of the phones we buy usually come with an AC charger that can be plugged into a wall socket. Some of them can also be plugged into the USB ports of your laptop or desktop in case there is no wall socket around. These kinds of devices are usually lightweight and inexpensive and are available for almost all high-end to low-end phones. Due to their pocket-friendliness, you can buy a few and keep them as spares in several places so that you don’t have to always carry one with you. For the lead battery, I have a battery charge controller, that keeps the voltage for charging at the right current with build in protections.
These are the most up-to-date kind of chargers when it comes to car adapters. As we mentioned in the beginning, no one wants to be left with a dead phone battery. That is why we looked for solar chargers that were powerful enough to keep all your devices charged up. Although some are more powerful than others, each of our picks is capable of charging more than one device at a time. For the power banks, we looked for quality lithium-ion and lithium-polymer batteries that could hold enough power to charge your devices multiple times on a single charge. The PowerPort 4 is one of the fastest multiport chargers we’ve tested, across all of its ports.
The control circuitry can be built into the battery or in the external charging unit, or split between both. Most such chargers have a cooling fan to help keep the temperature of the cells at safe levels. Most fast chargers are also capable of acting as standard overnight chargers if used with standard NiMH cells that do not have the special control circuitry. Slow battery chargers may take several hours to complete a charge. High-rate chargers may restore most capacity much faster, but high rate chargers can be more than some battery types can tolerate. Such batteries require active monitoring of the battery to protect it from overcharging.
USB 1.0 is old enough that you’ll virtually never see it, so USB2 – USB 3.2 covers the spectrum for most people. Separately from that, there’s USB-C, which is a physical connection standard that devices can use. In almost every case, your PC is the host, and your smartphone, tablet, or camera is the device. Power always flows from the host to the device, although data can flow in both directions, such as when you copy files back and forth between your computer and your phone. The descriptions below apply to all versions of USB currently in-use, including USB 3.0, 3.1, 3.2, and their various substandards (1×2, 2×2, etc). Wattage Find out the wattage needed for the device you own before purchasing a charger. While most USB-C chargers will be able to accommodate smartphones and tablets, those looking to charge compatible USB-C laptops will need to ensure that their charger has enough juice for the job.
The yellow output is wide, showing a lot of noise, combined with many large voltage spikes of about 1/3 volt. The Belkin charger eschews the minimal design styling of most chargers, with a roughly oval cross section, curves and ribs, and a cover over the USB port. The above photo shows a real iPhone charger and a counterfeit ; the two chargers are almost identical, down to the green dot. If you look closely, the genuine one says “Designed by Apple in California”, while the counterfeit has the puzzling text “Designed by California”. The counterfeit also removed the “Apple Japan” text below the plug. I’ve seen another counterfeit that says “Designed by Abble” . I assume the word “Apple” is removed for legal or trademark reasons, since the word “Apple” is often missing from counterfeits. The types of the counterfeit chargers are a mess, as they advertise one power level, actually supply a different power level, and have the charger type for a third level. For example, the counterfeit iPhone charger is advertised as supplying 1 amp, but has the 2A charger type, so an iPad will expect 2 amps but not obtain enough power. On the other hand, the counterfeit iPad charger claims to supply 2 amps, but really only supplies 1 amp and has a 1A type.
The hub may also have some non-removable functions in place of ports. A self-powered hub is a device that provides high-power ports. Optionally, the hub controller may draw power for its operation as a low-power device, but all high-power ports draw from the hub’s self-power. Proprietary, hazardousExisting for specific proprietary purposes, not inter-operable with USB-IF compliant equipment and possibly damaging to both devices when plugged in. In addition to the above cable assemblies comprising two plugs, an “adapter” cable with a Micro-A plug and a standard-A receptacle is compliant with USB specifications. On the device side, a modified Micro-B plug (Micro-B SuperSpeed) is used to cater for the five additional pins required to achieve the USB 3.0 features (USB-C plug can also be used).
In our tests , the RAVPower Pioneer RP-PC133, delivered a full 15 watts (3.27V, 4.72A) from its Type-A port while also providing up to 54.9 watts (19.6V, 2.8A) from its USB-C port at the same time. As of this writing, Aukey’s Omnia PA-B2 is the smallest USB-C laptop charger on the market. This diminutive wall wart measures just 1.77 x 1.77 x 1.18 inches, which makes it even smaller than RAVPower’s tiny Pioneer RP-PC112, which is just 1.9 x 1.9 x 1.2 inches itself. The Omnia PA-B2 is also a full 0.45oz lighter than its competitor. If you’re using a 16-inch MacBook Pro or another USB-C laptop that requires more than 65 watts of juice, the Aukey Omnia PA-B5 is your best bet. Though it is conservatively rated for 65 watts, in our tests, the 3.65oz Aukey Omnia PA-B4 managed a maximum sustained rate of 72.6 watts (19.2V / 3.78A). After 20 minutes of that maximum the temperature hit a steamy 139 degrees Fahrenheit, but the charger was a much cooler 120 degrees, the second coolest of all chargers we tested, when run at 64 degrees. We benchmarked several USB-C laptop chargers with Gallium Nitride to help you find the right one for you. This Aukey phone charger is about as dinky as they come, just a couple of inches wide and an inch thick.
The stainless-steel look keeps your kit safe from the worst case of clumsiness, while the 1200mAh battery lasts all day long. The power aspects of the spec are similar to USB 2.0 except that a “unit load” is raised from 100mA to 150mA and a high-power port has to supply six, rather than five, unit loads. This means that a low-power USB 3.0 port can supply 150mA, and a high-power USB 3.0 port can supply 900mA. Even though it seems that Li+ cells have taken over the portable world, NiMH cells have not been standing still. Surprisingly, NiMH energy per volume is only about 15% lower than Li+, although energy per weight is still quite a bit less. The biggest weakness of NiMH is its high self-discharge, which has largely been solved by hybrid NiMH cells, such as the SANYO® Eneloop® cell, that retain as much as 85% of their charge after one year. The attractions of NiMH cells are cost, safety, and easy user replacement, at least when standard cells are employed. Direct-connect switch-mode charger with ±22V overvoltage and reverse-polarity protection.
USB Type-A fixed current limit switches are commonly used in various applications worldwide. With more than 100 devices in our portfolio, you can feel confident we have a device for your application. Then check out this completely different multi-port charger from Portronics. This charger has 6 ports consisting of pure white color and having smart UFO shape. Awaiting to know more, then check out the features of this unique multi-port charger. The eighth position among multi-port chargers is taken by the TP-Link company. This model of charger is circular and fits easily in the palm. The remaining 3 ports provide you the fastest possible charge. They are providing you 10 port-charger with a plastic finish.