A thermal detonator is a compact yet powerful explosive device contained in a small, silvery sphere. Once activated, an internal fusion reaction starts within the sphere which eventually grows into a deadly explosion.
Princess Leia Organa, disguised as the bounty hunter Boushh, used a thermal detonator while negotiating a steep sum for the capture of
Chewbacca the
Wookiee. For the fearless use of such a deadly weapon, Boushh earned the hulking crime lord's respect and a sizable bounty as well.