Key Takeaways
1. The iPhone 17 series introduces the 40W Dynamic Power Adapter, capable of briefly delivering up to 60W for faster charging.
2. The Dynamic Power Adapter is the first to use the adjustable voltage source (AVS) from the USB-PD 3.2 standard.
3. Charging tests showed the adapter could sustain 60W output for up to 18 minutes before smoothly transitioning back to 40W.
4. The adapter does not support some USB-C standards like PPS or Qualcomm QuickCharge 4.0, limiting compatibility with certain devices.
5. The charger can enable 4K output for docked Nintendo Switch 2, which typically requires 60W of power.
Apple has introduced the iPhone 17 series, which are the first phones to work with the new 40W Dynamic Power Adapter, capable of reaching up to 60W. This charger, as its title implies, can briefly provide 60 watts (W) to compatible devices. However, it generally settles back to 40W for most of the charging process, helping to reduce overall charging times.
Innovative Charging Technology
This Dynamic Power Adapter represents a significant step forward, being the first to implement the adjustable voltage source (AVS) version of the universal USB-PD 3.2 standard. A Reddit user named privaterbok showcased this in a charging experiment using the new charger.
At present (September 17, 2025), it wasn’t possible to test the USB PD 3.2 AVS with the iPhone 17 models since they are still in the pre-order phase. The Adapter, however, is available on Amazon for $39.
Performance Insights
Privaterbok reported that the Dynamic Power Adapter successfully charged a MacBook Air at 60W, even though it was recognized as a 40W source. The charger maintained its peak performance while connected to a small portable power station, sustaining the high output for up to 18 minutes before transitioning “smoothly” back to 40W without sudden voltage drops.
Interestingly, the 40W Dynamic Power Adapter managed to stay relatively cool, reaching a temperature of 62°C, even though it is the smallest mobile charger Apple has ever created.
Limitations and Compatibility
The Reddit user used a multimeter and found that this accessory does not support some common USB-C charging standards like PPS or Qualcomm QuickCharge 4.0. This means it might not charge all USB-C devices in the best possible way.
On a positive note, it was reported that the charger allowed a docked Nintendo Switch 2 to output in 4K, which is typically not possible unless it receives 60W of USB-PD power.
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