Does the Galaxy S25 Ultra Support Wireless Charging?
Yes — the Samsung Galaxy S25 Ultra supports wireless charging at up to 15W via Qi2, plus 4.5W reverse wireless charging.
The Galaxy S25 Ultra supports 15W Qi2 wireless charging and 4.5W reverse wireless charging.
Quick Answer
Yes. The Samsung Galaxy S25 Ultra supports wireless charging at up to 15W via the Qi2 standard. It also supports 4.5W reverse wireless charging for sharing power with accessories.
Wireless Charging Specifications
| Spec | Detail |
| Wireless Charging | Yes |
| Maximum Wireless Speed | 15W (Qi2) |
| Standards | Qi, Qi2 |
| Reverse Wireless | Yes, 4.5W |
| Wired Fast Charging | 45W |
The S25 Ultra sits at the top of the Galaxy lineup. Despite supporting 45W wired charging, the wireless cap remains 15W — this is an industry-wide limitation due to heat generated by inductive transfer at high wattages.
Qi2 Certification on the S25 Ultra
The Galaxy S25 series was the first Galaxy S line to ship with official Qi2 certification. Qi2-certified chargers are guaranteed to deliver 15W reliably, having passed interoperability testing. Non-certified chargers labelled 15W may only deliver 10-12W in practice.
Compatible Chargers
For maximum 15W: Any Qi2-certified wireless charger with a USB-C PD 25W+ adapter.
For standard charging: Any Qi-certified pad at 5-10W. Fine for overnight charging.
Samsung-brand chargers: Samsung Wireless Charger Pad and Stand deliver reliable 15W and are fully optimised for Galaxy devices.
Real-World Charging Times
The Galaxy S25 Ultra has a ~5000 mAh battery:
| Charger Type | Estimated Full Charge |
| 5W Qi pad | ~6 hours |
| 10W Qi charger | ~3.5 hours |
| 15W Qi2 charger | ~2.5 hours |
| 45W wired | ~55 minutes |
Use the Charging Time Calculator with 5000 mAh for a precise estimate.
Wireless PowerShare
Wireless PowerShare lets the S25 Ultra charge other Qi accessories. To activate: swipe down the notification panel and tap Wireless PowerShare. Place a Galaxy Watch, Galaxy Buds, or other Qi device on the back of the phone.
The phone will automatically pause PowerShare if its battery drops below 30% (this threshold is configurable in settings).
Common Issues
Charging stops at 80% — Battery protection mode caps charging at 80-85% to extend long-term battery life. This is intentional behaviour found in Settings > Battery.
Slow charging with Samsung pad — Ensure your power adapter is 25W or higher. A 5W USB brick will limit the session to 5W regardless of pad capabilities.
S Pen concerns — The S Pen slot does not affect wireless charging performance.