I found the energy tank but I'm still stuck in here.
Lower left part of the room if you're still stuck.
Edit: I figured it out! I'm sorry I'm such a dumbass. I didn't realize you could aim diagonally until just recently.
It's fine, that part is there for that exact reason: to try and force the player to learn about diagonal aiming. :)
Thank you for the help. You're a good dev :)