I've no qualms about repeating that I regard Lezyne as irresponsible due to selling "Drive" lights without marking them clearly as additional lights which do not satisfy the Road Vehicle Lighting Regulations, so are unsuitable for actually driving a bicycle on our roads. I'm pretty confident that calling them irresponsible for that is fair comment and it would be surprising if they started screaming defamation for what is basically a bad review! I'm surprised anyone would think they're so petty.
Don't forget my original post on this point had a

in it
On your basis then I presume the vast majority of light brands in the UK are irresponsible?
Anyway lets not get distracted from the dangers of rechargeable lights. Lezyne in this case have been acting in a responsible and concerned manner to date, as one would expect, but they are not the only manufacturer to have instances of Li-ion batteries fail dramatically during charging.
I certainly am changing my charging practices in chargers used, location where there are charged, placing them in a fire resistance container whilst charging and finally, and probably most importantly, not having them on charge when I am not in the room.