Celeste's "Worth Your Salt" errand in the Shrouded Sky update sounds simple until you're actually in Spaceport getting shot at. She wants experimental salt batteries to help keep Speranza's grid from flickering out, and the game acts like it's a tidy fetch quest. It isn't. If you're trying to prep your loadout or just figure out what's worth hauling, it helps to skim ARC Raiders Items first, because you're about to carry something that turns you into walking loot.
Finding the prototype
You're heading to Rocket Assembly in the north of Spaceport. Inside, climb up to the upper level on those red metal catwalks. Don't overthink it. Behind the row of red lockers there's a small container, and that's where the Battery Prototype sits. The moment you pick it up, your character moves like they're knee-deep in mud. No sprint, no gunplay, nothing. So clear the top floor first, shut down any wandering ARC units, and only then grab the thing.
Charging without getting deleted
Next, drag the prototype down to the ground floor and look for the Industrial Recharger in the centre of the hangar. It's big, boxy, and lit up enough that you'll spot it while panicking. Slot the battery in and hit the side panel to start charging. Here's the nasty part: you're locked into a short animation while it runs. That's the window other Raiders love—free damage, free wipe, free battery. If you've got a teammate, have them watch angles; if you're solo, listen hard and don't start the charge if footsteps are close. When it's done, the machine spits out a Charged Battery.
The drop-off bug and the mad rush
All that's left is carrying the charged battery to the metal drop-off crate in the northwest corner of the ground floor. Drop it in and the objective completes, even if you die right after—no extraction needed—and you get the Vita Spray Blueprint to craft or sell. But the quest is blowing up for one reason: the crate is bugged. Only one player per match can use it; once someone turns in their battery, everyone else loses the interact prompt. That's why people spawn in and sprint straight to Rocket Assembly like it's a speedrun, and why you'll see ambushes set up on the obvious routes. If you want to make it less miserable, go early, expect company, and bring a kit that can win a close fight—check what you've got in ARC Raiders weapons in RSVSR and pick something that ends pushes fast.