iPhone Fold's MagSafe Compromises and ROHM's NFC Chips: The Two Forces Shaping Wireless Charging's Future in 2026

The evolving charging ecosystem: from phones to foldables to wearables, one standard emerging

1. iPhone Fold + MagSafe: The Foldable Charging Paradox

The week's biggest consumer tech story broke on April 26-27: Apple's forthcoming iPhone Fold, slated for fall 2026 release, will include MagSafe — but at a significant cost. The device reportedly sacrifices five key features found in the iPhone 18 Pro to achieve its ultra-thin foldable form factor, including a custom action button and certain sensor arrays. This "feature spillover" challenge mirrors a broader tension in wireless charging development: as devices get thinner and more complex, charging technology must adapt to physical constraints that didn't exist in the slab-phone era.

The five major technical challenges behind Apple's foldable engineering prototype include thermal management in a sealed hinge mechanism, where wireless charging coils must operate in an unusually constrained space with limited heat dissipation. The MagSafe confirmation is significant because it means Apple has solved the coil placement problem — positioning the charging coil to work in both folded and unfolded orientations. But the compromises reveal that foldable wireless charging is not simply a matter of transplanting existing technology into a new form factor.

1.1 What MagSafe on a Foldable Means for the Industry

The implications of MagSafe on a foldable extend far beyond the iPhone Fold itself, setting precedents that will shape the entire foldable device category:

• Dual-orientation coil design: The MagSafe coil must work in both folded (phone) and unfolded (tablet) states, requiring a charging system that tolerates variable device geometry
• Thermal constraints: Foldable devices have less surface area for heat dissipation per watt of charging power, potentially limiting sustained charging speeds compared to slab phones
• Magnetic interference: The hinge mechanism contains ferromagnetic components that could affect MagSafe alignment accuracy, requiring adaptive magnetic shielding
• Case compatibility: Foldable cases are structurally different from slab cases, requiring new MagSafe ring integration approaches that work with folding mechanics
• Charging stand redesign: Existing MagSafe stands assume a flat phone back; foldables in open mode have a different center of gravity and physical footprint

This mirrors the feature spillover challenge that Samsung faced with the S25 Ultra's virtual aperture bug — pushing boundaries in one area creates unexpected constraints in others. For wireless charging, the foldable form factor demands a new generation of adaptive charging systems that can handle variable device geometry.

1.2 Samsung's Foldable Charging Experience

Samsung has been refining foldable wireless charging since the original Galaxy Fold in 2019, and the Galaxy Z Flip 8 wireless charging guide demonstrates the maturity of Samsung's approach. Key learnings from Samsung's foldable charging journey include the importance of coil placement away from the hinge, thermal throttling algorithms that account for the reduced cooling surface, and software optimizations that limit charging speed when the device is actively being used in unfolded mode. Apple will benefit from these industry learnings, but the iPhone Fold's unique design choices may introduce new challenges that haven't been encountered before.

Scenario differentiation and product form evolution: the dual-track strategy shaping wireless charging's future

2. ROHM's NFC Chipset: Charging's Smallest Frontier

While Apple tackles the challenges of charging a larger, foldable device, ROHM is solving the opposite problem: charging devices so small that Qi coils cannot physically fit inside them. The ML7670 receiver and ML7671 transmitter chipset uses NFC's 13.56MHz frequency to enable wireless charging in smart rings and compact wearables — a device category that has been growing explosively but has been held back by charging inconveniences.

This is the chip revolution that enables energy freedom for the smallest devices. The smart ring market has grown from a niche curiosity to a significant wearable category in 2026, but charging has been its persistent weakness — proprietary docks that are easy to lose and use physical contacts that corrode with sweat exposure. NFC charging eliminates both problems at the silicon level, opening the door to mainstream smart ring adoption that was previously constrained by charging friction.

2.1 The ML767x Technical Deep Dive

ROHM's chipset builds on the proven ML7660/ML7661 predecessor with several key improvements:

• Smaller footprint: Reduced package size enables integration into ring-sized devices with coil diameters under 10mm — previously impossible for any wireless charging technology
• Improved efficiency: Higher power transfer efficiency at NFC frequencies (up to 1W), enabling practical charging times for wearable batteries in the 15-50mAh range
• Enhanced FOD: Foreign Object Detection adapted for the NFC frequency range, ensuring safety at the close proximity to skin that ring charging requires
• Backward compatibility: ML7671 transmitters can charge ML7660-equipped devices, protecting early adopters' investments and ensuring a smooth technology transition

The development of this chipset signals a broader industry trend: as device categories diversify, charging standards must diversify as well. One size no longer fits all in wireless charging — but the goal is for all sizes to work together on the same charging surface.

Wireless charging technology layers: from Qi to Qi2.2 to NFC, the standards stack is growing

3. Qi2.2 25W: The Speed Standard That Changed Everything

The Qi2.2 25W standard, validated by real-world testing on April 27, 2026, represents the maturation of wireless charging as a genuine wired replacement rather than a convenience compromise. An iPhone 17 Pro Max charges from 0 to 100% in 1 hour 40 minutes on Qi2.2 — nearly matching the 90-minute wired charging time. This speed milestone has cascading effects across the entire industry.

3.1 Market Impact of Qi2.2

• Wired charger sales decline: For the first time, manufacturers are reporting decreased wired charger sales in markets where Qi2.2 adoption is highest, particularly in East Asia and urban Western markets
• Accessories shift: Phone case manufacturers are optimizing for Qi2.2 magnetic alignment rather than cable routing, changing the fundamental design priorities of mobile accessories
• Enterprise adoption accelerates: The strategic value of wireless charging in enterprise applications increases dramatically when charging speed matches wired alternatives, removing the last barrier to corporate deployment
• Environmental benefit: Environmental regulations intensify as phones sold without chargers become the norm; Qi2.2 pads serve multiple devices simultaneously, reducing per-device e-waste

The 2026 wireless charging product market analysis confirms that Qi2.2 is the fastest-growing segment of the charging market, with 25W chargers projected to dominate mid-range and premium categories by Q4 2026. The technology has crossed the tipping point from "nice to have" to "must have."

Wireless charging's promise: power that's as natural and effortless as the technology is invisible

4. The Convergence: One Charger to Rule Them All

The most significant long-term trend emerging in 2026 is the convergence of charging standards toward a unified platform. For the first time in the history of wireless charging, a realistic path exists toward a single charging station that handles every device you own — from your largest tablet down to your smallest ring.

4.1 The Unified Charging Station of 2027

The wireless charging revolution is reshaping the battery life ecosystem of all electronic devices. When one station charges everything, the concept of "charger compatibility" becomes obsolete — every device simply works with every station, just as every Wi-Fi device connects to every router. This is the ultimate goal of the wireless charging industry, and it's closer than most people realize.

5. 2026 and Beyond: The Road to Spatial Wireless Power

The ultimate destination of wireless charging evolution is spatial wireless power — the ability to charge devices at a distance, without physical contact with any pad or surface. While this technology is still in its early stages, the building blocks are falling into place rapidly:

• AuraCharge and similar systems are demonstrating near-field spatial charging at distances up to 1 meter, using focused RF beams that deliver power to specific devices within a room
• Beamforming RF charging can deliver power to targeted devices, though currently at very low wattage (under 1W) — sufficient for maintaining a charge but not for rapid replenishment
• Qi2.2's enhanced communication protocol lays the groundwork for device-to-charger negotiation at greater distances, establishing the "handshake" infrastructure that spatial charging will require
• NFC's proximity power model demonstrates that short-range wireless power delivery is commercially viable, providing a stepping stone to longer-range solutions

The evolution paradox from iPhone 18 Pro to wireless charging is that as devices become more powerful and power-hungry, users increasingly refuse to plug them in. The resolution lies in making wireless charging so fast, so ubiquitous, and so invisible that the distinction between "charging" and "not charging" ceases to exist in the user's experience. Power becomes ambient — like Wi-Fi, something that's simply always there when you need it.

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Elecdov Technical Team

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