I think that you need to complete a short quest chain to be able to take this world quest.
Charging the Batteries is normal quest with same mechanics. You can find more info about questchain here : Vol'dun Quests №59-63
A Few More Charges is Vol'dun world quests and you can start it at The Cracked Coast subzone when it is active.
- Use [npc=143377]
/way Vol'dun 28.63 68.58 The Lectric Frequency Modulator
- You will be transformed into [npc=139409]
Feed lashers to the ranishu
Roll over lashers in the area, avoid small tornados or you will be thrown into the air and knoked back.
If you can complete this quest in 45 seconds or less you get Hungry, Hungry Ranishu
Hint: try to search for [npc=142895] or [npc=139929]. They give more score.
A Few More Charges quest video: https://www.youtube.com/watch?v=GE_DPk0nRAE