Where in that article does it actually come out and say the batteries were to blame?
I read there was some battery issues BUT they DO NOT KNOW if it was due to an external short or the actual batteries. They say that the batteries could have provided the energy for a short to cause the fire.
If it was an external short you cannot hold the batteries responsible, ANY chemistry of battery can provide the energy for the short to cause a fire.
Sorry to say this is nothing but fear mongering as the linked article itself doesn't even come to a positive conclusion to the cause of the fire.
They say could have been a short, could have been the batteries.....
Also nowhere in the article do they state the batteries burned, ceiling tiles and insulation yes but not the batteries

"Detailed examination of the ELT has shown some indications of disruption to the battery cells"

Some indications of disruption does not sound like burning batteries to me.....

Lotta people stretching to blame this one on lithium batteries!