Chennai bound IndiGo flight diverted to Hyderabad after ablaze onboard: How power banks catch fire on plane?

IndiGo flight 6E 6115 from Delhi to Chennai was diverted to Hyderabad following 'smoke' onboard, the company said. Here's why a power bank can pose risk in an aircraft.

source https://www.livemint.com/news/india/chennai-bound-indigo-flight-diverted-to-hyderabad-after-ablaze-onboard-how-power-banks-catch-fire-on-plane-11791906428781.html