“Found these in the Zaporizhzhya direction. The enemy is throwing chocolates with an explosive mechanism. Do not open them under any circumstances. Our guy was lucky that it did not detonate, otherwise he could have ended up crippled. I know guys whose fingers were torn off like that.”
The wire in the middle is bent and acts as a spring. The metal disk on top slaps the tan paper on bottom when the wrapper is removed. No power, all mechanical.