Find missing battery cell

How do you complete "Find missing battery cell"?

This is step 2 of 5 in Communication Hideout, given by Shani. It is completed on Buried City. The exact location is marked on the Buried City map.

• Communication Hideout
• Buried City

What are the other objectives in Communication Hideout?

Communication Hideout has 5 objectives in total: Reach the Red Tower in Old Town, Find missing battery cell, Install the battery cell in the Generator, Enable the power on the Generator and Boot the antenna terminal near the Red Tower.