This is the sentence before the one that I am asking about:
If we broke open all their newest phones, which are just a fraction of the total that’ve been built, and split them into their component parts, that would produce around 85,000 kilograms of gold, 875,000 of silver, and 40 million kilograms of copper.
And this is the sentence that I am interested in:
How did this precious cache get into our phones, and can we reclaim it?
Does cache refer to the memory? Or "precious cache" is a different term and refers to something else?