Find The Cell On The Path
Just follow the path coming from the gate you are catapulted from and you will
just walk into the power cell. And around here you can also find
all the scout flies.
Open the Precursor Door
There is a precursor door on the backside of a mountain, but Samos will tell you so
in no time.
Follow this path a bit and you will reach a blue eco vent. Load up on blue
eco and stand in front of the door, the door opens and you can collect the power cell
behind.
Climb Up The Cliff
After you opened the door with the blue eco a cut scene plays and Samos explains
the green eco to you. After this you jump over some spiky wooden posts to the next
platform and climb up there. Once you are on top you have to cross the abyss and there
you are at the power cell.
Free the 7 Scout Flies
...please see
Scout Flies - Geyser Rock 
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