Apple 96W USB-C Power Adapter on a MacBook Air: Measured
Negotiates 94 W at 4.7 A - the largest contract in the series. Swap to a non-e-marked cable and the same adapter drops to 60 W, with the app naming exactly what's missing.
See the measurements →Apple 40W Dynamic Power Adapter (60W Max) on a MacBook Air: Measured
One charger with two ratings. It offers 40 W sustained and a 60 W peak marked DPS, and the Mac negotiates the peak - drawing 56.1 W live.
See the measurements →Dell WD22TB4 Thunderbolt Dock on a MacBook Air: Measured
Negotiates 90 W at 4.5 A while simultaneously carrying Thunderbolt 4 at 40 Gbps and a Realtek gigabit LAN adapter. One cable doing what a charger cannot.
See the measurements →Anker 20,000mAh Power Bank on a MacBook Air: Measured
Delivers 62.3 W to a laptop from a battery, with five fixed profiles and PPS up to 5 A. It also identifies itself as Chipsea Technologies - the PD controller chipmaker, not Anker.
See the measurements →UGREEN 30W Charger on a MacBook Air: Measured
Delivers its full 30 W and offers that rating three times over - at 12 V, 15 V and 20 V. The most flexible fixed-profile menu in the series.
See the measurements →AUKEY 20W Charger on a MacBook Air: Measured
Delivers its full 20 W, but over a 12 V rail rather than the usual 9 V - and offers that rating on both. Includes PPS up to 2 A.
See the measurements →Apple 35W Dual USB-C Power Adapter on a MacBook Air: Measured
One port in use: the full 35 W. Second port occupied: every profile drops to about 17 W. The same adapter, measured both ways.
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Apple 30W USB-C Power Adapter on a MacBook Air: Measured
The M1 MacBook Air's bundled charger delivers 28.4 W and offers its full 30 W twice, on two different rails. It also reports its own manufacturer and product name.
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Anker Nano 30W GaN on a MacBook Air: Measured
Delivers 28 W live, offers its full 30 W on two different rails, and adds a PPS range for phones. It also reports no name at all - macOS just calls it 'Power Supply'.
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Anker 20W Nano Pro on a MacBook Air: Measured
Delivers its full 20 W at 9 V. The readout is byte-for-byte identical to Apple's 20W cube: same two profiles, same active rung, same live draw.
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Apple 20W USB-C Power Adapter on a MacBook Air: Measured
The iPhone cube delivers its full 20 W to a MacBook Air, from just two profiles with no 15 V or 20 V laptop rail. 9 V x 2.22 A is 20 W exactly - a designed number.
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Apple 18W USB-C Power Adapter on a MacBook Air: Measured
Delivers its full 18 W from just two profiles. Famous for being 0.22 A short of what the HomePod mini demanded at launch - until a software update relaxed the requirement.
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Dell 65W USB-C Charger on a MacBook Air: Measured
Delivers its full 65 W, using a 3.25 A top rung that a 3 A cable can't carry. It reports itself only as 'pd charger' - the Dell name comes from its PD vendor ID.
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Amazon Basics 68W GaN Charger (PD68U) on a MacBook Air: Measured
The USB-C port delivers its full 60 W, and drops live to 50 W the moment the USB-A port is loaded. 68 W is a shared budget, not the sum of the two ports.
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Apple 5W USB-A Charger (A1385) on a MacBook Air: Measured
The classic iPhone cube delivers 4.6 W to a MacBook Air. No fast-charge profile at all - just a plain 5 V / 1 A port, capped by the charger itself.
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Apple 12W USB-A Charger (A1401) on a MacBook Air: Measured
Rated 12 W, delivers 7.1 W to a MacBook Air - identical to the 10W brick. The twist: a USB-C iPhone still pulls the full 12 W from this same charger.
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Apple 10W USB-A Charger (A1357) on a MacBook Air: Measured
Rated 10 W, delivers 7.1 W to a MacBook Air. The Mac won't use Apple's legacy 2.1 A signaling, so both sides fall back to BC 1.2 and its 7.5 W ceiling.
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