The Samsung Galaxy S24 Ultra supports wired charging with a maximum power capacity of 45 watts. This is often referred to as "Super Fast Charging 2.0" by Samsung. To achieve the full 45W charging speed, a compatible charger and cable setup is required because the phone itself supports adaptive fast charging technology specifically designed for this wattage.
To enable super fast charging with the S24 Ultra, users need to use a 45W travel adapter accompanied by a USB Type-C cable rated for 5A current and E-marked for 45W charging. The cable included in the S24 Ultra box, however, only supports up to 3A, which limits the charging speed to 25W. Therefore, to utilize the phone's full 45W charging capability, purchasing a separate 5A USB-C cable is necessary. Without this cable, the phone will only charge at the slower 25W rate, even if a 45W charger is used.
Charging tests reveal that using Samsung's official 45W charger and the proper cable can charge the S24 Ultra's 5000mAh battery to about 69% within 30 minutes, reaching full 100% charge in approximately 65 minutes, with the final 20 minutes tapering off the charging speed before the battery is fully topped up. The initial charging phase delivers voltages around 9.5V, slightly dropping to 9V as the battery approaches full charge. The power starts at about 46W for the first minute and 19 seconds, then decreases gradually through 35W, 31W, and 22W as charging continues, finally slowing down almost to zero power near the end of the charge cycle.
These charging speeds put the S24 Ultra among the faster charging premium smartphones available in the western market, competing well against contenders like the Pixel 8 Pro and iPhone 15 Pro Max in terms of charge times. Nonetheless, Samsung has not prioritized extremely fast charging beyond this 45W level, as some other brands provide even faster charging solutions in competing phones.
Besides wired charging, the S24 Ultra also supports 15W wireless charging and reverse charging (either wired or wireless) to charge other devices.
The super fast charging feature can be turned on or off in the phone settings under Battery > Charging settings > Fast charging. However, the option appears as "fast charging" on the device, which includes both fast and super fast charging modes collectively. When connected with the proper 45W charger and 5A cable, a "super fast charging 2.0" notification will appear.
In summary, the Samsung Galaxy S24 Ultra:
- Supports up to 45W wired charging (Super Fast Charging 2.0).
- Requires a 45W travel adapter and a 5A USB-C cable for maximum charging speed.
- Includes a 3A USB-C cable in the box, which limits charging to 25W if used.
- Can charge to about 69% in 30 minutes and fully charge in around 65 minutes with the correct charger and cable.
- Also supports 15W wireless charging and reverse charging.
- Users need to enable fast charging in settings, although the device groups fast and super fast charging together under one option.
The phone's charging implementation uses USB Power Delivery (PD) with Programmable Power Supply (PPS) protocol adapted to Samsung's specifications, contributing to an efficient and fast charging experience when all criteria are met.
In practical terms, to get the best fast charging experience on the Galaxy S24 Ultra, purchasing a certified Samsung 45W charger along with a compatible 5A USB-C cable is necessary because accessories bundled with the phone may only support 25W charging, which reduces the charging speed compared to what the device is capable of achieving.
This explains why some users may need to buy additional accessories to maximize their charging speeds if they want to fully leverage the S24 Ultra's 45W super fast charging capability. Without these, charging speed is limited but still respectable at 25W. Battery capacity of the device is 5000mAh, matching the previous generation S23 Ultra, with similar charging duration times when using optimal chargers and cables.
Overall, the Samsung Galaxy S24 Ultra charger wattage rating is 45W, supporting rapid and efficient battery charging under the right conditions. Users should ensure the use of matched cables and chargers to fully benefit from this feature. This wattage offers a good balance of fast charging speed without excessive heating or battery stress, typical for flagship smartphone charging technology in 2024-2025.