The display has a grid of sensors that generate an electromagnetic field.
When the S Pen comes close, it draws power wirelessly from the display (no battery needed for basic writing, drawing, or hovering).
This allows for pressure sensitivity, tilt detection, and hover functions without an internal power source.
🔋 S Pen Models
1. Standard S Pen (like on Note series, S21 Ultra, S22 Ultra, etc.)
Works without charging for writing/drawing.
No built-in battery.
If you buy the optional S Pen with Bluetooth (S Pen Pro or S Pen with Air Actions) → those need charging.
2. S Pen with Bluetooth (Air Actions support)
Found in models like S22 Ultra, S23 Ultra, S24 Ultra, S25 Ultra.
These have a tiny rechargeable battery inside for Bluetooth features (remote shutter, media control, gestures).
Still works for writing/drawing even if the battery is empty — you just lose the Bluetooth/gesture features.
⚡ Charging Technique
The S Pen charges wirelessly inside the phone slot.
When you insert the pen into the phone, inductive charging coils recharge its internal battery.
Charging is very fast — usually less than a minute gives hours of Air Action use.
The phone shows S Pen battery status in the Air Command menu or Bluetooth settings.
