Galaxy S26 Ultra Wireless Charging Stuck at 10W/15W

Published: September 17, 2026

Your Galaxy S26 Ultra shows Charging or Fast charging instead of Super fast wireless charging when you connect it to a 25W wireless charger, while the charging speed stays at 10W to 15W instead of going higher. There can be different reasons for this. The problem can be with the charger, the power adapter, a case or magnetic accessory, heat, or a charging setting on the phone.

Table of Contents

Quick Fix

Use a Qi2.2 wireless charger that supports 25W charging on the Galaxy S26 Ultra. For 25W charging, Samsung’s 25W Qi2.2 wireless charger supports the Galaxy S26 Ultra with the correct power adapter.

Then go to Settings > Battery > Charging settings and turn on Fast wireless charging. Place the phone correctly on the charger and check the charging speed again.

Why Is Galaxy S26 Ultra Wireless Charging Stuck at 10W or 15W?

Wireless Charging Standard and Charger Compatibility

Simply using a charger labeled 25W is not enough for good performance. For better results, use a branded charger such as Samsung’s Qi2.2 25W Magnet Wireless Charger.

Wall Adapter and USB-C Power Requirements

The wall adapter affects the charging speed. Samsung’s 25W Magnet Wireless Charger can provide up to 25W wireless charging when used with an official 45W Samsung adapter or a compatible 20V PPS adapter.

Note: Adapter requirements can vary by wireless charger, so check the manufacturer’s recommendations for the charger you are using.

Heat and Charging-Speed Reduction

When the phone gets too warm while charging, the charging speed slows down until it cools down. Direct sunlight, a thick case, or heavy use while charging can make the phone warmer. Keep the phone in a cool, well-ventilated place while charging.

Case, Alignment, and Magnetic Accessories

A thick case, metal parts in the case, or placing the phone off-center on the charger can reduce wireless charging speed.

For magnetic charging, use a compatible Qi2 case and place the phone correctly on the charger.

Step-by-Step Fixes

Check	What to do	What to expect
Charger	Confirm the charger supports 25W wireless charging for your phone.	A charger that does not support 25W charging will not provide 25W.
Wall adapter	Check the charger’s recommended adapter requirements.	An unsuitable adapter can limit the charger’s output.
USB-C cable	Use the cable supplied with the charger or a good-quality compatible cable.	A damaged cable can affect power delivery to the charger.
Case/accessory	Remove the case or magnetic accessory and test again.	If charging improves, the case or accessory may be affecting alignment.
Temperature	Move the phone and charger to a cool, well-ventilated place and avoid direct sunlight.	Charging speed should return as the phone cools down.
Settings	Check that Fast wireless charging is enabled in Battery settings.	If it is off, wireless charging will be slower.

##1: Check the Wireless Charger

Check the charger model and its specifications to confirm that it supports 25W wireless charging. If you are using Samsung’s Qi2.2 25W Magnet Wireless Charger, use it with the recommended adapter.

2: Verify the Wall Adapter and Cable

Check that the wall adapter meets the charger’s power requirements. Inspect the USB-C cable for damage or a loose connection, and try another compatible cable if available.

3: Remove the Case or Magnetic Accessory

Remove the case or magnetic accessory and check if the charging speed improves without it. If the speed improves, the case or accessory may be affecting the wireless charging.

4: Check Phone Temperature

Check the phone while it is charging to see how warm it gets. If it feels too hot, unplug the charger and let the phone cool down. When charging again, place the phone in a cool place.

25W Wireless Charging: What Charger Setup Do You Actually Need?

Getting up to 25W wireless charging depends on the charger, wall adapter, and cable working together to provide the required power. If any part of the setup cannot provide the required power, the charging speed can be lower.

Component	Requirement for 25W Wireless Charging
Wall adapter	Samsung’s recommended 45W adapter or a compatible 20V PPS adapter
USB-C cable	A compatible cable that can provide the required power to the charger
Wireless charger	Qi2.2 wireless charger that supports up to 25W with compatible Galaxy devices
Case/accessory	A Qi2-compatible magnetic case for proper alignment, or no case

Even with the required charger and adapter, the phone may not always charge at 25W. Samsung says the actual charging speed can vary depending on usage, charging conditions, and other factors. Samsung’s official Wireless Charger specifications

So, 25W is the maximum supported speed, not a guaranteed speed for every charging session.

Compatible Wireless Chargers

Samsung Magnet Wireless Charger (with 45W Adapter) — Samsung’s own Qi2.2 25W wireless charger. It has a slim 4.4mm design and a 1.5m cable. With a compatible 45W adapter, it supports up to 25W wireless charging on the Galaxy S26 Ultra. A Qi2-ready case is required for magnetic alignment.

Belkin UltraCharge 3-in-1 Wireless Charging Stand with Qi2 25W — A third-party Qi2 25W charger that supports the Galaxy S26 Ultra at up to 25W. It includes a 45W power supply and a 1.5m USB-C cable, along with additional charging spots for compatible earbuds and a watch.

Before buying another third-party charger, check the manufacturer’s specifications for 25W support specifically on the Galaxy S26 Ultra. Simply having Qi2 certification does not mean every Galaxy phone will charge at 25W.

FAQs

Does 25W Wireless Charging Degrade the Battery Faster?

Samsung has not published a specific degradation figure comparing 15W and 25W wireless charging on the Galaxy S26 Ultra. Heat can affect battery health over time, so avoid charging the phone in very hot conditions.

Why Does My Charging Speed Change Partway Through a Session?

Charging speed can change as the battery level and charging conditions change. A lower speed later in the session is normal and does not necessarily mean there is a problem.

Author
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Rehman Gul

At FixerLab, I focus on making technology easier to understand. Through well-researched, easy-to-follow guides, I explain smartphone issues, app errors, software problems, and everyday digital challenges in a simple way, helping readers find clear and practical solutions with confidence.