G0OSE thanks for finding that.
That Amazon listing has a lot of technobabble in it.
But yes it does list “aluminum alloy body” as you point out. (Should say aluminium for the UK, no? )
It also lists the weight as 131 grams. That would be too heavy for an aluminum host alone. My brief search on BLF tells me an aluminum S2+ is 81 grams. Unless they are including the battery in which case that would be right on for an aluminum host with an 18650.
Like eating is proof of the pudding, weighing is proof of the material.
A ratio of 3.28 is a bit too steep, for an aluminum light has parts that are not aluminum.
And those are the same parts that are not made of copper in a copper light.
Anyway, my copper C2+ (1st.edition) weighs 175g without a battery, and 222g with a 30Q.
So 131g could be a thin-walled copper light without battery, or an aluminum light with battery.
Sorry to re-enstate the (remote) possibility this light is actually a copper light.
Henk, is it possible your copper S2+ may also be made from a copper alloy,
not
From pure copper? Cost effective? Better thermal properties? A better profit margin?
BTW, can we assume the electronic components of both the Cu/Al are similar, so
Cancels out.