Check the device’s maximum supported battery before inserting one. The release interface identifies insertion from your main hand and requires a tool to remove an installed battery.
Capacity relationships
| Battery | Developer description |
|---|---|
| Small | Half the capacity of Medium |
| Medium | Twice Small; one third of Large |
| Large | Three times Medium; fits certain devices |
These are relative capacities from item descriptions. They do not establish an exact runtime in minutes, because devices and operating modes consume power differently.
Insert and remove
Put the compatible battery in your main hand, then select the device’s insertion action. If removal is unavailable, inspect the indicated tool requirement instead of trying to drag it like an ordinary loose item.
A bigger battery is not automatically compatible. The empty-device prompt includes a maximum size, and the Large battery description explicitly limits it to certain devices.
Why this matters
Lights and medical support devices depend on power in different ways. A flashlight slowly drains its battery, while the Auto-pump relies on its internal battery to keep supporting circulation. Check power before committing to an expedition or emergency tool. Continue with light sources and auto-pumps.
Sources & version notes
Reviewed against the primary sources below. Version-dependent details are identified in the article; these procedures have not been personally playtested.
- Developer release 1.0 English reference: tutorial, items and status text (2026-11-11 checked)
- Official Release 1.0 Patchnotes (2026-11-09)
Compiled from public sources. We have not personally played or tested these procedures. Check your installed build and its tooltips when details differ.