I tried the ‘Plus Five’ rule to fix my iPhone’s slow wireless charging – here’s what happened


iPhone 16 Pro and Apple Watch Series 10 charging on Nomad Stand One Max.

Prakhar Khanna/ZDNET

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ZDNET’s key takeaways 

  • It’s easy to reduce the efficiency of a wireless charger without realizing it. 
  • Proper tools and charging gear ensure your devices charge quickly and safely.
  • Investing in at least a 20W wall adapter is a good starting point.

Wireless charging (often enhanced by MagSafe compatibility these days) is one tech development that I can say has improved my daily routine. These chargers are great for reducing cord clutter, charging multiple devices at once, and streamlining the look of your desk, table, or nightstand.

While wireless chargers are practical, it’s easy to miss out on their benefits without even realizing it. You could be using the wrong cables and wall adapters, turning your hands-free charger into a useless puck. Here’s how to fix that. 

Also: iPhone charging slowly? 6 quick fixes to try before blaming your battery

Since wireless charging isn’t 100% efficient, during charging, your device(s) may lose some power to heat and magnetic field leakage. To compensate for this, it’s best to use the cords and adapters that come with your wireless charger, or invest in a wall brick with a higher wattage than your charging setup.

Why your wireless charger isn’t charging fast

Here’s an example. If you plug a 15W wireless pad into a lower-wattage wall brick (especially one that’s not certified or purchased at sites like Temu, which raise safety concerns), your charger will likely work, but not at optimal levels. It’s more likely that this setup will throttle your charging speed from 15Ws to something lower, prolonging the time to charge fully and downgrading your setup from fast charging to something not quite as fast. 

Also: I added a MagSafe charger to my nightstand and realized its untapped potential: 3 ways it’s useful

My ZDNET colleague, Editor-in-Chief Kerry Wan, says this degraded charging experience happens often in his home, as it’s easy to flip-flop cords and wall bricks without noticing. 

Underneath the "robot" exterior is a powerful, high-quality 65W GaN charger

My colleague Adrian Kingsley-Hughes reading the output on this 65W Ugreen wall brick while charging a device. 

Adrian Kingsley-Hughes/ZDNET

Wan says he and his partner have a collection of random power adapters in their home office, and oftentimes use the wrong one for their wireless chargers in other areas of their home. “Switching to a higher-output Anker one or using the original charging brick for the pads (which usually deliver five watts more than needed) made things noticeably quicker,” Wan says. Oftentimes, you can see these changes reflected in how your device charges, too. 

Also: This handy USB meter tells you what’s actually going on with your ports – and it’s only $20

Wan says when his Samsung phone is charging with the correct wireless setup, it properly indicates “fast wireless charging” on his lock screen with a shorter estimated charge time. As a mobile gadget and accessories expert, I’ve seen this happen first-hand, too. 

I’m lucky to have plenty of fast chargers or gallium nitride (GaN) chargers lying around my house, so it’s not often I pick up a faulty setup. But it happens, especially with USB-C compatible accessories. While it seems like every USB-C device is interchangeable, there’s a reason why your iPhone doesn’t charge the same when you’re using the included cord or brick from a random Amazon gadget as it does when you’re using a certified setup, and the same goes for wireless charging. 

The “Plus Five” Rule

As a general baseline to avoid reduced charging efficiency, use a power adapter that provides 5W more than your wireless charger’s maximum output. In general, for iPhone fast charging, you’ll need a USB-C wall brick with at least 20W of power. Apple currently has a guide for power adapters, but standard charging requires a 5W USB or a 15W USB-C port. Many wireless chargers (often MagSafe options) now offer 15W Qi2 fast charging, so a 20W wall brick is a great idea.

Also: I cracked open cheap charging gadgets from Temu – and it was worse than I expected

We’ve tested several wall bricks and adapters, including options that can travel around the globe. I prefer 45W options for most of my everyday devices, except for my MacBook Pro, which I use a 67W or higher adapter for, as recommended by Apple. Lately, I’ve been using Anker’s newest 45W GaN charger, which features a built-in digital display. 

It’s also important to consider how you’re using wall bricks, too. If you charge multiple devices from the same adapter, the wattage is likely split. This reduces the wattage to each device and, in fast charging, likely drops your expected 15W speedy boost into a slow-to-go slurp. I recommend keeping at least one wall adapter dedicated to your wireless charging setup, so you never have to worry about unintentionally downgrading your charging. 

For wall adapters that the ZDNET team has tested and recommended, here are a few of our picks.





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Recent Reviews







Today, when one pictures a “classic Dodge Charger”, the first image that pops up is almost certainly one of the highly desirable Charger models from the late 1960s or early ’70s. Indeed, those early muscle car Chargers are iconic, playing a starring role in the “Dukes of Hazzard” television show and, somewhat more recently, “The Fast and the Furious” films. But as time ticks on, is it time to start appreciating the modern version of the Charger as a potential modern classic?

It’s now been over 20 years since Dodge brought back the Charger nameplate for a spacious four-door sedan with an optional HEMI V8 engine. While the basic Charger R/T was a potent machine for its time, Dodge really took the Charger’s game to the next level for the 2006 model year with the debut of the Charger SRT8. 

The SRT8 model used a larger version of the third-gen HEMI V8 that, combined with other performance upgrades, transformed the sedan into a serious performance car capable of running with its 1960s HEMI ancestors at the drag strip — to say nothing of its vastly superior handling and refinement. In the years that followed, Dodge would continue to improve the Charger’s performance with larger and more powerful HEMI engines, but the significance of the original Charger SRT8 is not to be overlooked.

A muscle car legend reborn for the 2000s

Today, with the modern Charger being such an established part of the car enthusiast world, it’s easy to forget some of the controversy that surrounded its mid-2000s return. Most of it focused on the fact that the beloved muscle car nameplate had been brought back for a four-door sedan rather than a retro-styled coupe. Fortunately, those people looking for that retro coupe would be satisfied by the reborn Dodge Challenger when it arrived a few years later, while the Charger went on to become a highly popular muscle sedan in its own right.

The addition of the SRT8 model to the lineup certainly helped, of course. Under the hood was the larger 6.1-liter HEMI V8, which differed from the standard 5.7-liter HEMI in several ways, not least the displacement. With the 6.1 under the hood, the SRT8 made 425 hp and 420 lb-ft of torque, easily laying down a mid-13-second quarter-mile time in Motor Trend’s hands. This was very quick by mid-2000s standards, especially considering the now-outdated five-speed automatic transmission.

But the SRT8’s performance went beyond just the drag strip. As part of the SRT transformation, Dodge also gave the car larger wheels and tires, a retuned suspension setup, and large Brembo brakes. While this didn’t necessarily make the car an agile road course weapon, it did give the SRT8 an athleticism that belied the Charger’s weight and size. 

The evolution of modern Dodge muscle

What’s even cooler about this era in Chrysler/Dodge performance history is that the Charger was just one of the four-door LX platform cars that the automaker offered with SRT badges and a powerful HEMI engine under the hood. Apart from the Charger, buyers could also choose from the more upscale, but ultimately short-lived SRT version of the Chrysler 300C sedan or the Dodge Magnum SRT8 station wagon.

The original Charger SRT8 marked the beginning of a long run of increasingly powerful, high-performance models. In the early 2010s, the Charger SRT8’s 6.1 HEMI was replaced by the larger and more powerful 6.4/392 HEMI, with that motor eventually becoming available in the less expensive Charger R/T Scat Pack. Then, of course, came the Charger SRT Hellcat, with a 707-hp, supercharged 6.2-liter that turned the car into a genuine super sedan.

So is the original Charger SRT8 a guaranteed future classic? Classified listings show that clean examples still bring decent money today, but the fact that it was followed by improved models may ultimately limit its potential for becoming a true, mega-desirable collector car. Regardless, though, the Charger SRT8’s accomplishments in modern muscle car history are not to be taken lightly.





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