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What the cited wireless-charging report establishes
IEA 4E lists EDNA’s 2019 report, Global Forecast of Energy Use for Wireless Charging. Its stated scope is the additional global energy use that could result if wireless charging were adopted across a wide range of small consumer devices. The listing does not provide the forecast’s numerical estimate or explain its assumptions, so it cannot substantiate a specific amount of wasted electricity or a claim of grid failure. Read the IEA 4E report listing.
That distinction matters: estimating extra energy use is not the same as showing that the electricity system would become unstable. The headline’s phrase “so inefficient” is also a judgment that requires a defined comparison—such as energy drawn from the wall versus energy delivered to a device—and evidence about the devices and charging conditions included.
Why wireless charging efficiency varies
There is no single efficiency figure that applies to all wireless chargers. Results depend on the equipment and operating conditions, and comparisons need to use the same measurement boundary. Relevant factors include:
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- 【3 Charging modes Available for Different Phones】7.5W charging mode is for iPhone 18 Pro/18 Pro Max/17/17 Pro/17 Pro Max/Air/16/15/14/14 Plus/14 Pro/14 Pro Max/13/13 Pro/13 Mini/13 Pro Max/12/SE 2020/11/XS/XR/X/8 with latest iOS System; 10W charging mode is compatible with S25/S24/S23/S22/S22 Ultra/S21/S20/Note 10/S10/S10E and so on; 5W charging mode works on Any wireless-charging-enabled devices like Google Pixel 3/3XL/4XL and other wireless-charging-enabled phones. Note: Adapter is Not Included, QC 2.0/3.0 adapter will be highly recommended.
- 【Unique Design Perfect for AirPods】 It is compatible with AirPods (with wireless charging case) and AirPods Pro. The size of the with AirPods fits perfectly into the charging area of the wireless charging pad, perfect wireless charging companion for AirPods, easier to find the “Sweet Spot”. Also, both top and bottom have a rubber ring, will keep your device in place and prevent slippage.
- 【Safer and Easier to USE】Exclusive Multifunctional Intelligent Protect Technology provides temperature control, surge protection, short-circuit prevention. Besides that, this wireless chargers is made of ABS Material which is fire-resistant, and has a UL Certificate, you can purchase it at assurance. Double guarantee and dual safety provide you safety experience. To get better experience, we would like you to take off the phone case and use the adapters recommended (NOT INCLUDED).
- 【More User-friendly Design】SLEEP-FRIENDLY DESIGN. The GREEN LED Indicator will flash for 3s if power source is connected, then turn on for 16s if recognizes your phone well. Entering charging mode, light will turn off and keep the whole charging process SLEEP-FRIENDLY.
- 【PACKAGE & SERVICE】You will get 1 x Wireless Charging Pad, 1 x 3. 3ft USB Type C Cable, 1 x User Manner and reliable 12-hour response service. At Yootech, zero risk purchase is for every customer's smiles.
- What is measured: electricity consumed at the wall, energy transferred across the charging interface, or energy reaching the battery are different quantities.
- Alignment and design: the arrangement and design of the transmitter and receiver affect transfer.
- Device and power level: a small consumer device and an electric vehicle are different systems and should not be treated as interchangeable examples.
- Use pattern: charging duration and how often devices are charged influence total energy consumption.
A U.S. Department of Energy FY2019 presentation discusses dynamic wireless charging for electric vehicles as an engineering problem requiring optimization and system-level assessment. Its efficiency figures are simulations for particular reference-pad designs, not measurements that establish a general efficiency rate for consumer wireless chargers. See the DOE presentation.
How charging can affect the power grid
Grid effects depend not just on total energy use but also on the size, timing, and location of the demand, as well as the capacity of the grid serving it. IEA guidance says that many electric vehicles charging at peak times can increase the need for marginal generation and raise system costs. Local effects can also depend on where vehicles are adopted, including possible pressure on lines or transformers and power-quality concerns. Read the IEA executive summary.
Rank #2
- 【Strong Magnetic Alignment｜Secure & Stable Charging】Equipped with an advanced magnetic array, the charger automatically aligns to the optimal charging position and holds your iPhone firmly in place (✅ no slipping even when shaken). ⚠️ Note: Non-MagSafe cases may weaken magnetic adsorption. For stronger attachment, we recommend using a MagSafe-compatible case.
- 【15W Fast Wireless Charging｜Quick Power Boost】 Supports up to 15W fast charging for iPhone 15 series, delivering a 50% charge in just 30 minutes and a full charge in 2.5 hours (✅ 3x faster than standard 5W charging). ⚠️ Note: A 15W/20W or higher PD adapter is required to achieve maximum speed. Using an adapter below 10W may result in slower charging performance.
- 【Silent Breathing LED｜Sleep-Friendly Design】Blue breathing pulse: Soft light during normal charging (automatically turns off after 1 minute, ✅ no sleep disturbance). Standby/abnormal alerts: Standby mode: Gentle green breathing light for 3 seconds before turning off. Foreign object detection: Rapid blue-green flashing for clear notification.
- 【Advanced Safety Protection + Efficient Cooling】Built-in smart chip monitors for overcharging, overcurrent, overvoltage, overheating, and short circuits. In case of any abnormality, the LED indicator will flash blue and green rapidly and automatically stop charging. Features honeycomb cooling vents on the back to dissipate heat effectively, ensuring safe and stable charging.
- 【Wide Compatibility｜Works with All Apple Devices】Compatible models: iPhone 17 Series: 17/17 Air/17 Pro/17 Pro Max iPhone 16 Series: 16/16 Plus/16 Pro/16 Pro Max iPhone 15 Series: 15/15 Plus/15 Pro/15 Pro Max iPhone 14 Series: 14/14 Plus/14 Pro/14 Pro Max iPhone 13 Series: 13/13 Mini/13 Pro/13 Pro Max iPhone 12 Series: 12/12 Mini/12 Pro/12 Pro Max Earbuds: AirPods Pro 4/3/2 (requires wireless charging case).
Those findings concern EV charging, which can create larger and more concentrated loads than charging small consumer devices. They help explain the grid mechanisms, but they do not demonstrate that widespread phone or other small-device wireless charging would cause a grid emergency.
What EV scenarios can—and cannot—tell us
A 2022 Nature Energy study modeled EV adoption in the U.S. Western Interconnection. In its forecast-adoption case, peak net demand could rise by up to 25%; in a full-electrification stress test, it could rise by 50%. These are scenario-specific EV results, not estimates for wireless charging of consumer devices. The study also found that infrastructure access and charging controls change the modeled grid outcomes. Read the study.
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- 【Fast Charging 2-Pack for Phones & Earbuds】Supports 25W wireless fast charging with the magnetic compatibility standard. This 2-pack charger efficiently powers your smartphones and earbuds - perfect for home, office, or sharing with family
- 【Efficient Charging】Delivers 25W fast charging, charging up to 20 minutes faster than traditional 15W wireless chargers and reaching 50% in approximately 30 minutes on compatible phones. Magnetic Alignment ensures enhanced energy efficiency, reduced heat generation, and optimized power delivery for a safer, faster charge. For best performance, please use a compatible power adapter (30W+ recommended, not included)
- 【Wide Compatibility】Compatible with all magnetic enabled devices, including iPhone Duo/18/Air/17/16/15/14/13/12 series, AirPods models (wireless charging case required). No need to worry about compatibility, simply place your device on the pad for a secure connection. The maximum charging power is determined by your device
- 【Strong Magnetic Alignment】Built with N52 magnets for precise magnetic alignment and secure attachment. The auto snap-on design ensures perfect positioning every time, reducing energy loss and improving charging efficiency compared to standard wireless chargers. These ultra-strong magnets ensure your phone stays secure even during vibrations or sudden movements while providing fast charging capabilities without interruption
- 【Case Compatibility】This magnetic charging pad works best with bare devices or MagSafe-compatible cases (≤0.12 inch/3 mm thick). For optimal charging speed and alignment, please ensure your device is Mag-enabled or use a thin Mag-compatible case. Not compatible with metal cases, cases with metal plates or credit cards, or non-Mag cases
How managed charging can reduce EV grid pressure
For electric vehicles, managed charging and proactive planning can help reduce coincident demand and make use of charging flexibility. IEA recommends integrating EV charging into power-system planning rather than treating projected adoption as a fixed, unmanaged load. These measures address EV charging; they should not be presented as proof that consumer wireless charging is a grid threat. See the IEA report on grid integration.
Quick Recap
Rank #4
- The Anker Advantage: Enjoyed by over 50 million users worldwide, our leading technology will change the way you charge.
- Complete Charging Convenience: Instantly charge your phone or earbuds simply by placing them in the center of PowerWave Pad. Never fuss around with plugging and unplugging cables again, just set down and power up.
- Universal Compatibility: PowerWave Pad provides 10W output for Samsung Galaxy, 7.5W for iPhone, and 5W for other phones or wireless earbuds (including AirPods).
- Through-Case Charging: Don't fumble with your phone case. PowerWave charges directly through protective cases up to 5 mm thick (not including cases with magnetic or metal attachments).
- What You Get: PowerWave Pad, 4 ft Micro USB Cable, welcome guide, worry-free 18-month warranty, and friendly customer service.
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