1 - Charger or Battery defective:
The charger of  the batteries for the slim or pen works as follows:
1a, If you unscrew the battery into the charger and then plug the charger into the light,
the battery should be approx 3 times flashing and the light from the charger jump from green to red.
1b, If the battery is charged, the charger turns back to green again.

If you have any other problems, send us an Email, please to: info@freesmoke.eu