Dell S500 Projector - Manual (Page 46)

LED Indicator on Interactive Pen
Amber LED Solid
On
The Amber LED will turn solid ON during the charge
process.
Amber LED Off Once battery is fully charged, the LED will turn OFF
indicating "Charge Complete".
Amber LED
Flashing
If the Amber LED starts FLASHING (0.4sec ON, 0.6sec
OFF, 1sec per flashing cycle), it indicates no charging takes
place. Charger error or bad battery is identified.
Docking Charger Specification (Power Supply)
Model: Interactive Projector Pen Charging Station
Power Supply: Input AC 100-240 V, 50-60 Hz, 0.2 A
Output DC 5 V/1 A
Maximum temperature: 40 ºC
Using Your Projector 46