How to Solve the Ancient Fort Battery Puzzle in Arc Raiders

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If you want to improve your gear during a raid in Arc Raiders, head over to The Blue Gate map. This is currently the toughest map available and offers a challenging endgame experience with many ARC enemies and rough terrain. It also includes several small puzzles that reward you with loot once solved.

One of these puzzles is found at the Ancient Fort. It involves locating three hidden batteries to open a locked cellar door. While it sounds straightforward, finding the batteries can be tricky if you’re unsure where to look. Here’s what you need to know to complete this puzzle quickly and get some good loot.

Where to Find the Ancient Fort Puzzle

The puzzle is at the Ancient Fort point on The Blue Gate map. To find it, go to the southeastern part of the map and identify a large stone structure. On the eastern side of this fort, you’ll see a cellar door that’s locked, with three cables extending from it. This door is where the loot is stored, so keep this location in mind while exploring.

Ancient Fort is fairly remote, so you might not encounter many ARC enemies outside of Wasps, Hornets, and Snitches. Additionally, in the town just northwest of the fort, a Leaper or a Bombadeer can spawn, so keep your distance from those.

How to Complete the Ancient Fort Puzzle

To unlock the cellar, you need to find three batteries and carry each to a different electrical box. The batteries are roughly the size of the typical Field Crates and can’t be stored in your inventory. Carrying a battery will slow you down significantly, cause you to holster your weapons, and drain stamina quickly if you try to run with it.

You will need to bring each battery to its corresponding electrical box, which are always in the same spots:

Along the southernmost wall of the fort.
On the second floor of the tower inside the fort.
On the second floor on the northern side of the fort.

These electrical boxes are easy to identify because they glow bright blue when you’re near with a battery, and they open at an angle.

Tip: If you’re having trouble locating a box, follow the cables coming from the cellar.

All Battery Locations in Ancient Fort

The batteries are scattered around and inside the fort. Their spawn points are usually marked by a wooden pallet on the ground—this is a good visual cue, although the pallet remains even if no battery spawns there. In total, there are about twelve potential spawn locations for batteries, but only three will be present at a time. Keep a close eye on each location.

You will find batteries in the following spots:

Along the southwestern road that curves around the fort.
Inside the ruined house northwest of the fort, just before the town. Usually on top of the generator.
In the northern, ruined house between the fort and the town, near the old, collapsed building.
Inside the fort, beneath the southern wall, in a room with containers that can be broken.
Inside the tower’s second floor on the north side.
Behind the rusted, white car southwest of the fort.
At the top of the tower in the fort.
Inside the house southeast of the fort, on the generator.
Inside the destroyed house east of the fort, among satellite dishes.
In the ruined building southwest of the fort, near the old vehicle.
Inside the fort’s southern room with breachable containers.
At the final spawn point directly west of the fort inside a ruined structure.

Note: Only three batteries will spawn each time, but these locations are consistent, making it easier to check each spot systematically.

Looting the Basement

After placing all three batteries in their respective boxes, the cellar door will unlock. Descend the ladder into the basement where you’ll find a weapon case and various electrical and medical items. Keep an eye on the computers; advanced electrical components often spawn there. Be cautious, as the basement has only one entrance, and enemies waiting outside might surprise you. Clear the area before looting to maximize your safety and rewards.