The charger has some voltage sag, but the current is nice and constant. The yellow line is relatively thin, showing good regulation. Similar to the iPhone charger, the iPad charger shows a lot of voltage sag. The voltage is about 5.1 V unloaded, dropping to 4.4 volts and 2.3 A (10.1 W) at the corner. Unlike the iPhone charger, the iPad charger has pretty good current stability. The regulation is solid, as shown by the narrowness of the yellow trace. The output from this counterfeit charger is a wall of noise. In order to fit the waveform in the display, I had to double the scale on the left and increase it by a factor of 5 on the right, so the yellow curve is actually much worse than it appears. On the left, note the huge ripple with massive high-frequency noise on top. This output is not something you want to feed into your phone.
This model looks great but to a certain extent that doesn’t really matter too much. You see, the body of the charger will be hidden out of sight, with only the top plate visible, completely flush with the accessory port. The part that is visible boasts an all aluminum construction whilst the port glows with a very pretty – and actually very useful – blue light. Of course, if you’re praying about USB chargers, it might be wise to redirect some of that energy. Some people are reluctant to buy a USB charger because they have visions of a big, funny shaped lump sitting up out of the dashboards. For most people, the practical abilities of larger USB chargers outweighs their sometimes less than aesthetic looks. If you have a modern, flush dash and you don’t want to ruin its visual appeal with an unsightly, bulky charger then this could be the answer to your prayers.
Unlike traditional USB chargers that plug into cigarette lighter sockets, this doesn’t generate a bunch of RFI. Apparently Powerwerx provides proper filtering of the switching supply, unlike most manufacturers. The LA District Attorney’s warning covers many attack vectors, because there’s different ways that criminals can abuse USB wall chargers. You can also charge your two MacBooks simultaneously if you want to, and it charges both of them entirely in just two hours! The intelligent power allocation system is another feature that got my attention. When two devices are connected, it equally distributes the power, and when a single device is connected, it produces up to 60W power for a single device. Quntis has got Amazon’s Choice tag for the “iPhone 11 fast charger” term and there must be a reason for that, isn’t it?! Moreover, it comes with a USB-C to lightning cable which is 6 feet long and I think that’s more than enough.
Like the MAX8934, the MAX8903 is a dual-input design that accommodates USB and adapter inputs through separate connections. Switchover between power sources is automatic, as is hand off between input power and battery power. With BC1.1 it is possible for devices to charge only from USB-defined sources. Those devices are becoming more common, but still you may want to retain the option of charging with an ordinary, possibly non-USB-compliant, adapter. This is best accomplished with a dual-input charger that handles the switchover when one external power source takes over for another. In the past, power hand off was often done with either lossy OR-ing diodes or discrete MOSFET-comparator circuits that can become complex when “sneak” current paths and switch timing are considered. Fortunately, many charger ICs now include power hand-off control. Integrating this function does more than simply replace external components.
So the author should have tested first if the charger was a standard USB-charger or Apple-crapped. Because now the test results are useless, because non-standard charger can deliver only max 500 mA to a standard device. You can make Apple-compatible non-standard charger into standard 2000 mA supercharger by connecting +D to -D. The Apple 2A (i.e. iPad) information is a new result from my measurements. For details on USB charging protocols, see my references in my earlier posting. My previous iPhone charger and fake charger teardowns were surprisingly popular, but if you were hoping for teardowns on the full set of chargers, you’ll need to wait for a future blog post. I haven’t torn the chargers apart yet; if I need to take more measurements, I don’t want to have just a pile of parts. But I do have some preview pictures to hold you over until my teardown article.
The product is capable of operating in the range from 100 Volts to 240 Volts, which makes it an essential charger for traveling. With this handy and highly powerful unit, you will be able to quickly charge all of your smartphones and tablets (as well as other USB-powered devices) in a just a couple of hours. The VoltageBoost technology is able to detect the cable resistance and level the output amperage accordingly. As a result, you get a lightning-fast charging speed no matter how long the power cable is. The USB or “Universal Serial Bus” port was originally designed as an easy way to transport data between devices. This revolutionized the way data was shared and stored, and by 1998, Apple had developed and released the iMac G3, the first computer to convert to USB.
The higher the amperage of a USB car charger, the faster the device will charge. Since not all smartphones require or can support a high amperage, it’s integral for you to check your smartphone manual to verify the maximum supported charging speed before purchasing a car charger. A good recommendation would be a car charger with 4.8 amps. While the GiQ car charger may look like any other car charger, it isn’t. It is bundled with 2-charging technologies; the Power Delivery and Qualcomm Quick charge. With a maximum capacity of 52.5 W, the charger is capable of charging smartphones 60% quicker than traditional adapters. The body is made out of heat-resistant ABS aluminum alloy and reinforced by a gold-plated circuitry system that protects overcurrent and short circuits. The LED power indicator that shines bright when connected to a power source. The sleek and lightweight design of this CHOETECH car adapter makes it a popular option for cars with less space.
Alternatively, you may also be interested in car chargers for a fast charging of your mobile gadgets on the go. While some act as simple switches and adapters for the AC outlets, the others can be used as fully fledged chargers . The main advantage of both charger types is their ability to increase the regular power output of the outlets and, as a result, charges your devices almost twice as fast, compared to regular power adapters. Depending on their amperage, different ports, even in the same device, can deliver different charging power. The higher the amperage number, the faster the port will charge your device. This is especially important for large tablets or smartphones with large batteries that require long charging times. Currently, the highest available port amperage is USB 3.0. When shopping for a multiple USB port charger, look for a powered one. These chargers have a number of advantages including saving space.
The official no-load charger star ratings are discussed at Meeting 30 mW standby in mobile phone chargers. Amusingly, semiconductor manufacturers have recently introduced chips that allow chargers to sequentially pretend to be different proprietary chargers until they trick the device into accepting the charger. It seems crazy that companies design incompatible chargers, and then chip companies invent schemes to work around these incompatibilities in order to build universally compatible chargers. Two example chips are the TI TPS 2511 chip, and SMSC’s USC1001 controller, which pretends to be nine different charger types. See a comic-book explanation or a technical explanation for details. The above $2 charger is notable for its low-profile design; it’s about as thin as you can make a charger and still fit the power prongs and the USB port. Like the previous charger, it uses a very simple circuit, has little filtering, and almost no safety insulation.
These cables will work with the other accessories on this page — just be sure one side has a Lightning connector if you’re connecting to an iPhone, AirPods headphones or other Apple portable device. It’s not cheap, but it’s smaller than Apple’s own charger. Its power prongs fold out of the way for easier transportation. It comes with a USB-C cable, too or you can use your own such as a USB-C to USB-A cable, USB-C to VGA Adapter or USB-C to USB C Lightning cable. At 60 watts, it’s got enough power for a 13-inch MacBook Pro, but I used it with no trouble for my 15-inch MacBook Pro that comes with Apple’s 87-watt charger. An $89 version comes with an adapter to work in US, UK and European outlets. The $80Satechi 108W Pro USB-C PD Desktop Chargerhas a USB-C port that can pump out 90 watts of power for high-end laptops, a second 18W USB-C port and two 2.4-watt USB-A ports. It’s not svelte, but it can charge a lot of devices at once — good if your family is traveling and you need to get the most out of a motel room’s power outlet. The dual USB-C PD connectors set the Scosche Powervolt car charger apart from the rest. Each port supports 18W charging and is perfect for topping up smartphones, tablets, and gaming peripherals such as the Nintendo Switch .
Logicfest January 13, 2014 Remember when cell phones all had their own, strange proprietary plugs? Thank goodness most have changed to allow for both charging through standard USB ports and almost all use standard USB cables for recharging. Even Apple products use standard USB plugs for all their cables, albeit with odd, proprietary connectors. For example, let’s say you’re using an old 5V/1A charger on a brand-spanking-new smartphone. You’re going to have less than stellar results there, because it’s going to charge the device much more slowly than the charger that came with the phone. Does that mean you can’t use a 5V/2.1A charger, or even a 9V/2A charger (in the case of USB-C)?