As much as I dislike e mt bikes, I think it sucks that a product left to charge overnight self combusts.
I saw that and the "ensure damaged battery packs are fixed by an authorised repairer."The story was a little short on details, but the fire department left some clues like "only use the OEM charger", etc, which suggests that perhaps something wasn't 100% kosher. I don't know this... just saying.