Destroy the Balloon Lurkers
Pop Goes the Lurker
It is also related to a trophy titled Pop Goes the Lurker, completing this mission will reward you with a bronze trophy.
Using the A-Grav Zoomer at the fenced-off bay (from the beginning area, head left and follow the path) you'll have to tackle 7 Balloon Lurkers. They fly around in a contraption supported by a large balloon above them. Hanging from the front and back are two large mines. Hitting the mines takes away one health part, though they don't respawn meaning it makes hitting the lurker afterwards easier.
It is advised to avoid just speeding around and chasing after the lurkers without a plan, instead just watch their flight pattern and wait until they have gone back to their lowest position. Then steer the zoomer into their side to avoid hitting the mines. When completed the Power Cell spawns back at the shop, below in the cargo hold.