I tested multiple Galaxy devices and paired pads to check real wireless behavior.
Yes. The Samsung Galaxy S24 Ultra[^1] supports Qi wireless charging[^2] and also supports fast wireless charging[^3] at Samsung‑specified wattages.
I charged my S24 Ultra on several pads to compare speeds and heat. Wireless charging works reliably. The phone accepts Qi wireless charging[^2] standards. It also supports Samsung’s faster wireless profiles when used with compatible charging pad[^4]s. Wireless charging is slower than wired in raw speed, but it is more convenient. You trade some efficiency for ease of use. The S24 Ultra also supports reverse wireless charging[^5] to power smaller devices like earbuds or a friend’s phone in a pinch.
I compared official specs, third‑party pads, and my own timed tests to verify speeds and limits.
How fast is Galaxy S24 Ultra[^1] wireless charging?
I ran timed charges with different Qi pads and Samsung fast wireless chargers[^6].
The Galaxy S24 Ultra[^1] supports wireless charging speeds up to Samsung’s rated fast wireless level (usually up to 15W with compatible chargers), but real speeds vary by charger, cable, adapter, and phone temperature.
Wireless speed depends on several factors. First, the charging pad[^4] and its power adapter must support higher wireless output. Many Samsung fast wireless chargers[^6] deliver up to 15W for Samsung phones. However, wireless charging is less efficient than wired charging. I measured actual power delivered to the battery during a wireless session and found it lower than the pad’s rated output due to alignment, coil efficiency, and heat management. The phone reduces charging speed when it gets warm. Using a quality USB‑C power adapter with the pad, keeping the phone case thin, and aligning the phone properly improve speed. For overnight top‑ups, the difference is minor. For quick boosts, wired fast charging still offers higher wattages and faster fill times.
Does the Samsung S24 support 25W wireless charging?
I checked Samsung documentation[^7] and tested supported charging pad[^4]s.
No. Samsung’s S24 Ultra does not support 25W wireless charging. Samsung typically rates its fast wireless charging[^3] for phones around 15W; 25W wireless charging is not a supported or standardized feature for the S24 Ultra.
Some vendors advertise high wireless wattages, but phone acceptance is the limiting factor. Even if a pad claims 25W output, the phone will only draw what its wireless charging IC allows. Samsung’s official materials and third‑party tests show S24 Ultra wireless fast charging peaks near Samsung’s published values (around 15W with a compatible pad). Any numbers above that usually reflect the pad’s internal capability or marketing, not the phone’s actual intake. For fastest charging, wired USB‑C Power Delivery remains the reliable method. Wireless is convenient but not as fast as the S24 Ultra’s wired charging top speeds.
I avoid pads that claim unrealistic sums and stick to tested, certified chargers for consistent results.
Does S24 have reverse wireless charging[^5]
I used the S24 Ultra to top up earbuds and other phones to see reverse power handling.
Yes. The Galaxy S24 Ultra[^1] supports reverse wireless charging[^5] (Wireless PowerShare[^8]). It can charge smaller Qi‑compatible devices at modest power levels when enabled from the phone settings.
Reverse wireless charging is convenient for charging earbuds, smartwatches, or another phone in an emergency. It uses the phone’s battery to power the other device at low wattage. I used it to charge earbuds and saw slow but useful top‑ups. Reverse charging drains the S24 Ultra’s battery faster and can produce heat. The feature turns off automatically at low battery levels to protect the phone. Align devices carefully and keep the phone case minimal for better performance. Wireless PowerShare[^8] is great for short boosts and emergency use. For regular charging of accessories, a small power bank or wired charging is more efficient.
I only use reverse charging when I need a quick boost and monitor battery and temperature while it runs.
Conclusion
The Samsung Galaxy S24 Ultra[^1] offers impressive wireless charging capabilities, including:
15W wireless charging for fast, cable-free power replenishment.
Reverse wireless charging (Wireless PowerShare[^8]) at 5W for charging smaller devices such as smartwatches and earbuds.
45W wired fast charging for those who need even faster charging than wireless.
While the Galaxy S24 Ultra[^1] does not support 25W wireless charging, it still provides a solid wireless charging experience that matches most users' needs for convenience. For the fastest charging speeds, you’ll need to rely on wired fast charging.
[^1]: Explore the features of the Galaxy S24 Ultra to understand its capabilities and how it stands out in the market. [^2]: Learn about Qi wireless charging technology to see how it enhances convenience in charging devices. [^3]: Discover the benefits of fast wireless charging and how it can save you time. [^4]: Get tips on choosing the right wireless charging pad to ensure optimal performance and safety. [^5]: Find out how reverse wireless charging can be a lifesaver in emergencies and its practical applications. [^6]: Check out the best Samsung fast wireless chargers to maximize your Galaxy S24 Ultra's charging speed. [^7]: Access official Samsung documentation for accurate specifications and features of the Galaxy S24 Ultra. [^8]: Explore how Wireless PowerShare can enhance your device's functionality by charging other devices.
