The charged engrammeter is a device given to the player by Kharshai during Children of Mah. He asks you to retrieve his memory of Zamorak's betrayal of Zaros from The Empty Throne Room. Once the five memory springs have been harvested, the engrammeter is labelled (full) and it can be returned to Kharshai at the ritual site. If a partially or completely full engrammeter is destroyed, all the memories must be recollected, after retrieving a new engrammeter from Kharshai.