Would that stuff cause a huge fireball in the night sky? 2.9 tons is a hell of a lot of mass... amazing to think it will just burn up in the atmosphere.
I'd say it would burn up pretty nicely. Its not gonna be one homogenous lump of stuff that holds together on re-entry, its a bunch of smaller "things" (battery cells) bundled up and held together with an external shell.
As soon as that shell burns through its going to break apart and each individual part will start burning up.
Yeah probably most of the mass is aluminium sheet which melts quite easily hence Starship and the MiG-25 switching to steel, and also can burn quite well - it was the fuel in the shuttle's boosters.
