The article doesn’t say it was a battery fire, but from the video in the BBC article above, it was a pretty impressive blaze for a simple electrical fault. Of course the intensity of the fire might have been caused by all the disposable single use petroleum based plastic used to construct the climate conference pavilion.

“Some stupid with a flare gun
burned the place to the ground..”
Where is Greta?
Was her boat crew involved?
Harum-scarum-flarum.
But, but, but … Chevron offices burn too!
“The carbon…the carbon…”
Yep.
Quite the carbon footprint.
Bungle in the jungle.