Bring 90 orbs to the Geologist was a mission in The Precursor Legacy that Jak and Daxter completed to obtain a power cell. The Geologist asked Jak to bring her ninety Precursor orbs for her research equipment, which he completed in doing.
Walkthrough[]
Upon owning a total of ninety Precursor orbs, you can trade them with the Geologist for a power cell. The Geologist is located at her campsite in Rock Village; when walking towards the cafe and arena from the Blue Sage's hut, you will meet her on your left.