Can you charge a MacBook Pro 14″ (M5) with a Steam Deck 45W?
Worked out from the manufacturers’ specifications. Have a different charger? Pick it below the answer.
It charges, but at about 45 W — well below what the MacBook Pro 14″ (M5) can take. Fine overnight or while idle; under heavy use the battery may still drain.
Estimated from the manufacturer’s stated fast-charge time, with the device idle.
Try another charger
How long to 50% with each charger
Shorter bar is faster. The highlighted row is the charger on this page.
Want it faster?
Full speed needs 96 W or more. These chargers get there:
MacBook Pro 14″ (M5) charging specs
- Fast charging needs
- 96 W
- Max input (approx.)
- 96 W
- In the box
- 70W
- Battery
- 72.4 Wh
- Steam Deck 45W
- 45 W · USB-C
Sources: Apple: MacBook Pro (14-inch, M5) tech specs · Apple: Fast charge your MacBook Air or MacBook Pro · Steam Deck tech specs. Checked 2026-10-17.
Quick answers
Is it safe to charge the MacBook Pro 14″ (M5) with the Steam Deck 45W?
Yes. USB Power Delivery negotiates power, so the MacBook Pro 14″ (M5) 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 Pro 14″ (M5) need for fast charging?
96 W or more. Fast-charge capable with a 96W or higher USB PD power source.
How long does the MacBook Pro 14″ (M5) take to charge with the Steam Deck 45W?
About 55 min to 50% and 2 h 30 min to full, estimated with the device idle.