HC Valley Batteries provide the highest energy yield among Valley IV battery types in Arknights Endfield and are profitable when sold to locals. However, their production chain is resource‑intensive, requiring advanced materials and large quantities of raw inputs. Originium Ore and Ferrium Ore are particularly high‑demand; shortages in either can cause a complete production shutdown. Sandflower, by contrast, is straightforward to produce.

Required Components and Layout

The compact layout uses the main core area extensively and is oriented wider rather than longer. It can also utilize three extra output ports from cores and be copied to sub‑PACs or Outposts if space permits. The essential components include:

• 19 Bus Unloader Outputs (12 Originium Ore, 3 Sandflower, 4 Steel Parts)
• 15 Shredding Units
• 6 Grinding Units
• 2 Packaging Units
• 4 Thermal Banks
• Protocol Storage Stashes for excess materials

Production Priorities

The primary production focus should be on Dense Originium Powder and Steel Parts, as other inputs are integrated into these two lines. Sandflower is easy to manufacture, so players can direct most attention to maintaining a steady supply of Originium and Ferrium Ore.

Steel Production Line

The steel production sequence begins by setting two output ports to Ferrium Ore and one to Sandflower Powder. Ferrium Ore travels through Refining Units to Shredding Units. The shredded output then combines with Sandflower Powder in a Grinding Unit, followed by another Refining step, then a Fitting Unit. The belt loops back to a base core input port or a Protocol Storage Stash. If the core area is limited, this line can be attached to the Depot Bus; to produce Steel Parts instead of plain Steel, add a Refining Unit, Fitting Unit, and stash at the end.

This design shares a similar approach to the Buck Capsule (A) layout but differs in orientation and unit counts. It is compact and intended to fully utilize available output ports and central base space, unless that area is reserved for Planting Units.

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