Can you charge a MacBook Air 13″ (M4) with a Google 45W USB-C?

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 delivered45 W of 70 W max
0 Wfast: 70 W
0 → 50%
~43 min
0 → 100%
~2 h 5 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 · standard
~59 min
Google 30W USB-C
30 W · standard
~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 13″ (M4) charging specs

Fast charging needs
70 W
Max input (approx.)
70 W
In the box
30W or 35W Dual, depending on configuration
Battery
53.8 Wh
Google 45W USB-C
45 W · USB-C · PPS

Sources: Apple: MacBook Air (13-inch, M4, 2025) tech specs · Apple: Fast charge your MacBook Air or MacBook Pro · Google Store: 45W USB-C Power Charger. Checked 2026-10-17.

Quick answers

Is it safe to charge the MacBook Air 13″ (M4) with the Google 45W USB-C?

Yes. USB Power Delivery negotiates power, so the MacBook Air 13″ (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 13″ (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 13″ (M4) take to charge with the Google 45W USB-C?

About 43 min to 50% and 2 h 5 min to full, estimated with the device idle.

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