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.
This isn’t a fast-charger, per se, but it offers decent power and comes with cable. Click on the links below to read full reviews of all the chargers we tested for this roundup. We will continue to update this page as we review more chargers. This isn’t the best charger for someone with a QC2.0/3.0-compatible device, but for anyone else, it’s a low-profile, low-cost, dependable option. The chargers that have been discussed are summarized in Table 1. The MAX8903 switch-mode charger with Smart Power Selector capability charges at up to 2A from adapter inputs and 500mA from USB sources. The available current can be used by the battery or the system, or it can be split between them. A built-in suspend timer automatically triggers suspend when no bus traffic is detected for 10ms. A self-enumerating charger connects directly to the USB data lines, allowing simple systems to fully utilize USB charging without a USB transceiver or microprocessor resources. The USB transceiver and microprocessor handle USB enumeration.
Please let me know of additional AC/Mains USB-IF certified chargers that supply 80+ watts or portable battery packs that supply 60+ watts and I’ll add them to the list. 60-watt class power supplies and battery packs will max out the charge rate of these devices. 45watt class are the easiest to find at reasonable prices . I recommend against using 5w-18w class power supplies on these devices – but most 18w-29w class power supplies will work OK. For smaller laptops like the Surface Go or the entry-level MacBook 12″ there is no advantage in getting a high-power output charger or battery pack –45-watt class chargers will max out the charge rate just fine. Similarly watt output battery packs which output 15 volts will work fine. To follow-up from my previous Surface power supply article, I wanted to point out how easy it is to find USB-C chargers and battery packs lately. Here is a handy list of the most powerful readily available USB-C chargers and battery packs for premium laptops.
This step allows us to definitively say that our picks work exactly as advertised, putting out the right levels of power and adhering to safety standards. I’ve reviewed car chargers for Wirecutter since 2014, monitoring every noteworthy new model. Additionally, I’ve tested hundreds of other charging accessories, researching and writing our guides to USB wall chargers, USB-C laptop chargers, and USB-C accessories, among others. Previously, for three years I was the accessories editor at iLounge, where I reviewed more than 1,000 products, including numerous charging options. This is one of the most important considerations while choosing a car charger. You must ensure that the charger is compatible with your car and your device. While chargers usually come with different charging technologies, smartphones and tablets don’t. This is why it is crucial to check if your device supports the charging capabilities that the car charger has to offer.
For this charger, the upper line doesn’t get very far, showing that this charger doesn’t output much current. My suspicion is that it was only tested with 240 volts so it performs poorly with 120 volts, even though the label says it takes 100 to 240 volts. This counterfeit charger shows extremely poor regulation, as shown by the very wide yellow line. The amount of power supplied by this charger seems almost random. I’m puzzled by the steep voltage sag on both the iPhone and iPad charger. Since the designers of the Apple charger went to a great deal of effort to build a high quality charger, I conclude they must not consider voltage sag worth worrying about. Or, more interestingly, maybe they built this sag as a feature for some reason. For this charger, the voltage is approximately flat, except for a bump under no load which is probably a measurement artifact. The vertical yellow line shows the current stays nearly constant as the load increases.
Some USB cradles also allow you to take control of your mobile phone from your PC, allowing you to utilize your phone from your computers keyboard or mouse. Wall chargers – Wall chargers are designed to plug into existing 110-volt household electrical outlets, and typically would be used to replace the charger that came with your mobile phone. Aftermarket home chargers may also be designed to accommodate other electrical outlet receivers to make international travel with your cellphone easier. Industrial USB 2.0 20-Port USB 2.0 High Power Charger/Hub with 150W High Capacity Power Adapter and up to 1.1A charging current per USB port. A smart solution for charging or sync of several iPads, iPhones iPods and USB charging devices operating simultaneously. Fuse Reels’ $23 Side Windersnaps around your MacBook power adapter so you can wind up a 12-foot reach of cables into a tidy travel package. It’s got different shims to accommodate different sizes of power adapter — 45, 60, 61, 85 and 87 watts, but not the 29-watt charger for the smaller MacBooks — and it’s not hard to put together. You can spool up the full length of your power cord by twisting the inner grip and unspool it just by pulling the cable ends apart. Here again, though, make sure you get PD-compatible power output at 60watts or greater if you’re looking to juice up a laptop. The Aukey PA-Y19 30W USB-C wall charger is a notably compact charger .
When some portable audio players are plugged into a USB port, they are designed to go into a data transfer mode as soon as the data connection is made. In this mode, the device cannot be used to playback music even if files are not actually being transferred. By plugging the USB charger in without pushing it all the way forward to the data pins, the cable can make contact with the power pins and recharge the device while leaving it in a mode that allows playback. has two ports that support Qualcomm’s Quick Charge 3.0 standard, clearly marked in orange. Another four ports go up to 2.4A with Aukey’s AiPower technology, so they’ll determine what rate to charge when you plug in your device. You also have a power cable that is 3.9 feet long, which is plenty of length for most people’s space, but you can remove the cable if it gets in your way. A small green LED on the charging hub will tell you that the device is connected and available to charge. Its cylindrical design fits in the palm of your hand at 4.1 x 2 x 2 inches.
This ensures that any device plugged into the port will receive power before data transfer is attempted, cutting down on data errors. This design has another advantage when it comes to digital music players. With larger device batteries, new charging technology like Qualcomm’s Quick Charge, and formats like USB-C that allow for better charging throughput, chargers are more complex than ever. If interested, you can find any charger’s output information written intiny text somewhere on the charger itself. You certainly need to make sure you have an adequate number of ports to charge all your electronic devices. If you currently have two devices, for example, then do not limit yourself to a charging station with only two ports.
However, prior versions of USB could handle a limited amount of power, which is why laptop chargers have typically retained their larger, bulkier cables. The fact of the matter is that if you’re packing the right kind of charging cable , and your laptop or device was released in the past couple of years, you’ll be in very good shape. The key, of course, is getting one of the latest and greatest USB-C power delivery chargers. Thankfully, I’ve spent the past few weeks testing some of them, and I’ve found some go-to choices for fast charging on the go. You can find no shortage of small, $10-ish, dual-port USB-A chargers from reputable brands. AmazonBasics’s Dual-Port USB Car Charger, Anker’s PowerDrive 2, Aukey’s CC-S7, and Scosche’s ReVolt all perform identically to one another. Some models are shorter than others and end up looking like they’re part of your car when installed, and some have glowing ports that make it easier for you to plug in a cable when it’s dark.
This distinguishes the DCP from the original USB ports that carry data. Some Apple products limit the charge current by connecting different resistor values to the D+ and D- pins. RAVPower is one of the leading brands in manufacturing iPhone charging accessories. Whether it is a power bank or a wall charger, RAVPower has carved a niche. This Type C PD dual-port USB-C wall charger is known for its advanced power delivery of 61W output. The brand has crafted a slim and compact power adapter, which is easy to carry and store in your travel bag.
Unfortunately, these types of car chargers have basic protection systems. However, that same technology that helps work wonders also comes with its limitations. Similarly, smartphones, tablets, and laptops are indispensable little machines that need constant power to function. While most power banks serve the purpose, they also require a power outlet to recharge. Chargers increase the current to provide a higher amount of power quickly – this is measured in amps and the more amps means the more power. Therefore, a charger that comes with a smartphone will provide less amps than a charger that come with a tablet. You will need to consider voltage and the equipment you’ll need to use to enable the use of USB chargers when travelling internationally. For example, some wall chargers can supply more power than others and one particular USB socket on a laptop may vary in power from the others, or PCs with some able to charge whilst in sleep mode. The connector is universal and therefore it will work when used either way. It also outputs more power, as well as the theoretical output.
We’ve tested the best car chargers, and we have recommendations for affordable, reliable options that can fast-charge any device while you’re on the road. (As of this writing it’s selling for $10, and the company told us the price would never be above $20.) Each port is rated for 2.4 amps. Although our tests confirmed this claim, a tiny bump above that power-draw level—even as small as 0.01 amp—caused the variable load to reset. The other chargers we tested offered more wiggle room at their maximum output, without resetting. USB-C phone chargers have become dramatically smaller and less expensive in just a few years, to the point where you can get a great, fast charger for less than $20 (and often closer to $10). Anker’s PowerPort III Nano and Aukey’s Omnia Mini 20W USB-C Charger (PA-B1) are the best, most compact options for getting the fastest possible charge to most phones. They perform equally well, delivering 20 watts of power over USB-C. They’re both the same size and generally sell for the same price, so you should choose whichever is cheaper when you’re ready to buy. Affordable, fast, and compact, this charger can provide fast power to up to four devices at once, although not at the maximum speeds USB-C offers. If you want to get the fastest charge possible to two modern devices at once, this charger is the best of the few options available.
Most portable laptop and tablet battery packs deliver watts which means your premium laptop will take a long time to charge and may not deliver enough power to keep your machine running at full performance. Battery packs that deliver 60-watts or more are preferred. When evaluating the overall capacity of the battery pack to understand how long it will keep your device running on the road, compare the watt-hour rating of the laptop vs the battery pack. The high price may be due in part to using more expensive internals designed to support Qualcomm Quick Charge 3.0, but other Quick Charge units we tested cost less. Regardless, performance was respectable but unremarkable, consistently charging our test phone in 130 minutes. With a “normal” (non-Quick Charge) phone, this unit’s charging time was merely on par with other chargers. Larger than the RAVPower but still acceptably trim, the Maxboost also feels as if it was carefully designed and built using long-lasting materials. There’s even a grippy pattern molded into the plastic around the edge of the unit’s “head” that makes it easier to yank out of your car’s DC socket.