I quote: The shop that sold the device blamed the wrong batteries for the explosion.
Hence my original reaction.
You clearly have more information which I am sure you will gladly share with us.
We all know these devices can be dangerous and that the MSM can be full of bollocks but it's quite possible the device was faulty or being incorrectly used not allowing the batteries to vent safely or any of the other issues that can occur with a mech.
If that was the only statement the shop had for the press than that's poor form, if they gave a far more detailed statement then they should be seeking redress up to and including the PCC.
That isn't the only statement the shop had for the press.
We are talking about 'The Sun' here - hardly a bastion of professional integrity. They selected the one quote they wanted.