Can you charge a Galaxy S26 Ultra with a Steam Deck 45W?
Worked out from the manufacturers’ specifications. Have a different charger? Pick it below the answer.
It charges at normal speed. For the fastest speed the Galaxy S26 Ultra needs a charger with PPS, which the Steam Deck 45W doesn’t support.
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 60 W or more with PPS. These chargers get there:
Galaxy S26 Ultra charging specs
- Fast charging needs
- 60 W + PPS
- Max input (approx.)
- 60 W
- Battery
- 5,000 mAh
- Steam Deck 45W
- 45 W · USB-C
Sources: Samsung: Compare Galaxy S26, S26+, S26 Ultra · Samsung Newsroom: Galaxy S26 series announcement · Samsung: Enable fast charging (PPS requirement) · Steam Deck tech specs. Checked 2026-10-17.
Quick answers
Is it safe to charge the Galaxy S26 Ultra with the Steam Deck 45W?
Yes. USB Power Delivery negotiates power, so the Galaxy S26 Ultra 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 Galaxy S26 Ultra need for fast charging?
60 W or more, from a USB-C PD charger that supports PPS. Fastest charging needs a 60W USB PD charger with PPS.
How long does the Galaxy S26 Ultra take to charge with the Steam Deck 45W?
About 46 min to 50% and 1 h 55 min to full, estimated with the device idle.