Sentinel Batteries allow you to open more areas of the Fortress of Doom. This Doom Eternal Sentinel Battery Location Guide tells you where to find each of the Sentinel Batteries we have discovered so far. Sentinel Batteries are special, rare items that once found, can be installed at various locations in your ship, the Fortress of Doom.
Once you provide The Fortress of Doom with more Sentinel Batteries, more areas of the fortress become unlocked. Sometimes this simply allows you to access deeper parts of the ship, other times it unlocks new upgrades for your armor, more weapons, there’s a lot hidden behind the Sentinel Battery collectibles.
Important: From level 3 onward, each level has 3 challenges to complete. If you complete all three challenges on a single level, you will get a Sentinel Battery. Those are not included in this guide.
Doom Eternal Sentinel Battery Location Guide
On the first part of Exultia, you cannot miss it.
The Cultist Base. In the area with the red floating mines. Check out our Cultist Secret Guide if you’re struggling to reach it.
Another in The Cultist Base.
The nearby pillar is rising up and down. Step inside it, as it goes up, exit to the door.
On Doom Hunter Base mission. The room with the huge battle. Under the central walkway there’s a grate you can break to reach this secret.
On Doom Hunter Base mission
In the Super Gore Nest level, after you find the Rad Suit in the sewers.
Super Gore Nest level. After you fight through the second Buff Totem.
On Super Gore Nest. After you obtain the blue key
On the Arc Complex level. When you reach the map station, jump across to the other side.
Arc Complex level. Directly after you activate the first cannon and descend the lift. Can’t miss it.
Arc Complex level. Towards the end of the level in the large room with the purple goo.
On the Mars Core level. After you drop down the maintenance hatch to the BFG core.
On the Mars Core level. When you reach this location, use the jump pad to get high enough and then dash to reach the top
At the very end of the Mars Core mission
At the start of the Taras Nabad mission. Drop down where I’m standing and destroy the wall.
Also on Taras Nabad. You find it as you progress naturally