The Small Oxygen Tank is an oxygen storage item, and a smaller version of the Backpack's internal Oxygen storage. It can be attached to any slot on the backpack, including its widget slots.
小型氧气瓶（Small Oxygen Tank）是一种 氧气储存物品，是 背包内置氧气瓶的缩小版本。
When connected via a
Tether to a base module or vehicle, the Small Oxygen Tank will fill with Oxygen. 当通过
氧气栓绳连接到基地或者载具时，小型氧气瓶会充满氧气。 The Small Oxygen Tank attaches to any
Tier-1 slot and stores exactly as much Oxygen as the backpack's main tank (72 seconds when idling, 50 seconds when running.) 小型氧气瓶连接到小型槽位时，能储存和背包氧气瓶一样多的氧气（闲置72秒时间，跑动50秒时间。）
Having one Small Oxygen Tank in the
backpack doubles the player's Oxygen storage. When untethered, the Small Oxygen Tank's Oxygen is consumed prior to the backpack's. The oxygen gauge on the tank visibly empties as it is used.
If the player attaches a full oxygen tank to every auxiliary and widget slot on their
backpack and Terrain Tool and idles, they will be able to breathe untethered for about 16 minutes. If running while carrying the same load of Small Oxygen Tanks, they will be able to breathe untethered for about 12 minutes.