Does the Galaxy S21 Support Wireless Charging?
Yes — the Samsung Galaxy S21 supports 15W wireless charging and 4.5W reverse wireless charging.
The Galaxy S21 supports 15W Qi wireless charging and 4.5W reverse wireless charging.
Quick Answer
Yes. The Samsung Galaxy S21 supports wireless charging at up to 15W via Qi, plus 4.5W reverse wireless charging.
Wireless Charging Specifications
| Spec | Detail |
| Wireless Charging | Yes |
| Maximum Wireless Speed | 15W |
| Standards | Qi |
| Reverse Wireless | Yes, 4.5W |
| Wired Fast Charging | 25W |
Will Newer Qi2 Chargers Work on the Galaxy S21?
Yes. Qi2 is fully backward compatible with Qi devices. A 2026 Qi2 charger will work with the S21, delivering up to 15W. The S21 will not gain Qi2 features (like magnetic alignment) but will charge at normal Qi speeds.
Charging Times
The Galaxy S21 has a ~4000 mAh battery:
| Charger | Estimated Full Charge |
| 5W Qi | ~4.5 hours |
| 10W Qi | ~2.5 hours |
| 15W Qi | ~2 hours |
Common Issues on Older Devices
As the S21 ages, the battery capacity naturally diminishes. If charging feels slower than it once did, this is normal battery degradation rather than a charger issue. Check battery health in Settings > Battery > Battery Information.
If the back glass is cracked, the wireless charging coil may be affected. In this case, wired charging through USB-C is more reliable until the device is repaired.