The Galaxy S25 Ultra features a 45W wired charging capability, which is consistent with its predecessor, the Galaxy S24 Ultra. This charging speed is supported by a new charging profile that operates at 15V and 3A, which theoretically enhances efficiency by reducing power loss during transmission compared to previous models that used lower voltages[1][2].
Charging Performance
In practical terms, the 45W charging allows the Galaxy S25 Ultra to reach approximately 70% charge in about 30 minutes and a full charge in just over one hour[2][9]. While these times are competitive, they fall short compared to some rival devices. For instance, the OnePlus 13 can charge its larger 6,000mAh battery from 0 to 100% in around 43 minutes, indicating that the S25 Ultra's charging speed may not be as impressive when compared to other flagship smartphones[2][8].Efficiency and Limitations
Despite the technical advancements in voltage and current, many users find that the difference between 45W and lower wattage chargers (like 25W) is marginal, often amounting to only about 10 minutes in total charging time from 0 to 100%[7][8]. Furthermore, if users limit their charging to around 85%, the time difference becomes even less significant. This has led some to consider the 45W capability more of a marketing feature than a necessity for everyday use[7].Conclusion
Overall, while the 45W charging on the Galaxy S25 Ultra offers a slight edge in efficiency and speed over previous models and lower wattage options, it does not represent a substantial leap forward in charging technology. Users should weigh this against their specific needs and consider that other brands may offer faster charging solutions for similar or larger battery capacities.Citations:
[1] https://sammyguru.com/galaxy-s25-series-sticks-to-45w-charging-but-upgrades-to-15v/
[2] https://www.androidpolice.com/reasons-not-upgrading-samsung-galaxy-s25-ultra/
[3] https://www.youtube.com/watch?v=hEYcC533NoA
[4] https://www.androidfaithful.com/samsung-galaxy-s25/
[5] https://www.sammobile.com/news/galaxy-s25-galaxy-s25-plus-45w-charging-speed/
[6] https://www.youtube.com/watch?v=lkzUHycf1Qc
[7] https://www.reddit.com/r/samsung/comments/121rv25/confused_between_25w_and_45w_fast_charging_and/
[8] https://consent.yahoo.com/v2/collectConsent
[9] https://samsungmagazine.eu/en/2025/01/23/vse-o-bateriich-a-nabijeni-v-rade-galaxy-s25/
[10] https://www.phonearena.com/news/galaxy-s25-battery-and-charging_id163798