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There will, however, be situations when you run out of fuel in deep-space and can't reach a Grey Giant. This means you're stranded, but don't worry; there are other Stardrifters in the galaxy. Select "Send Help Request" from the Emergency Functions menu, and your Stardrifter will emit a distress signal. After some time, another Stardrifter will respond, and give you a few grams of its fuel. After all, what're a couple of lithium ions between friends? Of course, this also provides you with an interesting photo opportunity... To cancel a help request, select "Clear Status" from the Emergency Functions menu.

Your lithium supplies are also very slightly drained by various other functions of your ship, including your in-system drives, planet finder, starfield amplificator, and internal light.