Samsung S9 battery

The Galaxy S9 uses a non‑removable lithium‑ion battery, designed to fit the slim form factor of the device while supporting fast wired and wireless charging.

Capacity: 3,000 mAh. 

Approximate energy rating: ~11.55 Wh. 

Charging: Supports fast charging (wired) and wireless charging (Qi/PMA) standards. 

Talk time / usage estimates: Up to ~31 hours talk time (manufacturer estimate) for the S9.