Can you charge a MacBook Air 15″ (M4) with an Apple 40W Dynamic (60W Max)?

Worked out from the manufacturers’ specifications. Have a different charger? Pick it below the answer.

Answer
Yes, standard speed

It charges at normal speed. Fast charging needs 70 W or more.

Power delivered60 W of 70 W max
0 Wfast: 70 W
0 → 50%
~34 min
0 → 100%
~1 h 45 min

Estimated from the manufacturer’s stated fast-charge time, with the device idle.

Try another charger

Apple 5W USB-Aold iPhone cubeApple 20W USB-CiPhone chargerApple 30W USB-CMacBook Air base adapterApple 35W Dual USB-Ctwo-port compact adapterApple 40W Dynamic (60W Max)iPhone 17/18 fast chargerApple 70W USB-CMacBook fast chargerApple 96W USB-CMacBook Pro 14″ fast chargerApple 140W USB-CMacBook Pro 16″ chargerSamsung 25W Super FastGalaxy chargerSamsung 45W Super Fast 2.0Galaxy Ultra chargerGoogle 30W USB-CPixel chargerGoogle 45W USB-CPixel Pro XL chargerSteam Deck 45WValve charger in the boxASUS ROG 65WROG Ally charger in the boxNintendo Switch 2 AC adapter60W charger in the boxAny 65W USB-C PD (PPS)typical GaN chargerAny 100W USB-C PD (PPS)high-power GaN chargerAnker 715 (Nano II 65W)compact GaN chargerUGREEN Nexode Pro 45W (Smart Display)UGREEN 45W display

How long to 50% with each charger

Shorter bar is faster. The highlighted row is the charger on this page.

Apple 70W USB-C
70 W · full speed
~30 min
Apple 96W USB-C
70 W · full speed
~30 min
Apple 140W USB-C
70 W · full speed
~30 min
Any 100W USB-C PD (PPS)
70 W · full speed
~30 min
ASUS ROG 65W
65 W · standard
~32 min
Any 65W USB-C PD (PPS)
65 W · standard
~32 min
Anker 715 (Nano II 65W)
65 W · standard
~32 min
Apple 40W Dynamic (60W Max)
60 W · standard
~34 min
Nintendo Switch 2 AC adapter
60 W · standard
~34 min
Samsung 45W Super Fast 2.0
45 W · standard
~43 min
Google 45W USB-C
45 W · standard
~43 min
Steam Deck 45W
45 W · standard
~43 min
UGREEN Nexode Pro 45W (Smart Display)
45 W · standard
~43 min
Apple 35W Dual USB-C
35 W · standard
~52 min
Apple 30W USB-C
30 W · slow
~59 min
Google 30W USB-C
30 W · slow
~59 min
Samsung 25W Super Fast
25 W · slow
~1 h 10 min
Apple 20W USB-C
20 W · slow
~1 h 20 min

Want it faster?

Full speed needs 70 W or more. These chargers get there:

Apple 70W USB-C70 W · 0–50% ~30 minApple 96W USB-C70 W · 0–50% ~30 minAny 100W USB-C PD (PPS)70 W · 0–50% ~30 min

MacBook Air 15″ (M4) charging specs

Fast charging needs
70 W
Max input (approx.)
70 W
In the box
35W Dual
Battery
66.5 Wh
Apple 40W Dynamic (60W Max)
60 W · USB-C · AVS

Sources: Apple: MacBook Air (15-inch, M4, 2025) tech specs · Apple: Fast charge your MacBook Air or MacBook Pro · Apple: Fast charge your iPhone · Apple: Fast charge your iPad. Checked 2026-10-17.

Quick answers

Is it safe to charge the MacBook Air 15″ (M4) with the Apple 40W Dynamic (60W Max)?

Yes. USB Power Delivery negotiates power, so the MacBook Air 15″ (M4) only takes what it can handle and the charger only gives what it can supply. A weaker charger is slower, not dangerous.

How many watts does the MacBook Air 15″ (M4) need for fast charging?

70 W or more. Fast-charge capable with the 70W USB-C Power Adapter.

How long does the MacBook Air 15″ (M4) take to charge with the Apple 40W Dynamic (60W Max)?

About 34 min to 50% and 1 h 45 min to full, estimated with the device idle.

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