Uncommon item (green). What the game says, what it really does, what each copy adds and what it pairs with.

Fuel Cell
Uncommon item (green)
Your equipment gets one more use and recharges 15% faster. Each extra cell adds a use and faster recharge.
Game text: «Hold an additional equipment charge (+1 per stack). Reduce equipment cooldown by 15% (+15% per stack).»
Stacking: Each cell adds a charge; cooldown drops 15% of what is left and never reaches zero.
It has a void version: Lysate Cell. Pick that up and every copy of this item turns into it.
| 1 copy | 2 copies | 3 copies | 5 copies | 10 copies |
|---|---|---|---|---|
| −15% | −27.8% | −38.6% | −55.6% | −80.3% |
Each copy cuts a share of what is left: it never reaches zero.
equipment fires by itself with almost no cooldown.
kills lower the cooldown: non-stop equipment.
he carries two equipment slots: more charges and less cooldown on both.
Your equipment gets one more use and recharges 15% faster. Each extra cell adds a use and faster recharge.
Stacking: Each cell adds a charge; cooldown drops 15% of what is left and never reaches zero.
Sources: the game's English text (name and description), the Risk of Rain 2 wiki (riskofrain2.wiki.gg: this item's page, read on 31 October 2026; numbers, stacking formula and notes) and the wiki's survivor pages. The plain-words text and the synergies are ours. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).