The black hole can radiate its energy away and the energy of a black hole is equivalent to its mass, it’s possible that a black hole will simply evaporate after a long enough time. The black hole evaporation time is proportional to the cube of its mass. Enter the mass of the body and solar mass in the online calculator for black hole evaporation time calculation.
Calculate the evaporation time of a black hole if the mass of the body is 500 mg and the solar mass is 50 mg?
τe ∼ (5003 / 503) ×1066