The main risk is that these batteries can overheat and go into thermal runaway, a chain reaction that occurs when a lithium-ion cell enters an uncontrollable, self-heating state—resulting in extremely high temperature, smoke and, ultimately, a fire that is notoriously difficult to put out.
The gravitational influence of the black hole generates incredible tidal forces in the accretion disk, causing friction and heating its matter to temperatures as great as 18 million degrees Fahrenheit (around 10 million degrees Celsius).
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