Cerberus Mk 2’s battery at 17%

The power levels worried him more than the arm. The fighting and his stunt with the dumpster had burned off a chunk of the batteries’ charge. He was down to seventeen percent—maybe twenty-five or thirty minutes under great conditions.

Excerpt From Ex-Isle, pg 585
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017