Declarations are meaningless. This will not prevent fires ot occur.
And what would you suggest be done to reduce the risk? Asking passengers to travel without phones or laptops isn't realistic.
https://www.forbes.com/sites/suzannerowankelleher/2025/08/26...
It's statistics at the end of the day. If you have 300 people carrying several batteries in the body of the airplane, and any of them has enough energy to cause an immediate fire, you are playing with odds.
> What we should do
Completely banning portable batteries (chargers) would be a start. You cut the risk by a lot already because they are rampant.
At least on a plane, you have well-trained staff and fire extinguishers readily available.