The battery pack in the OPs light is Li-Ion, not Li-Poly.

Consumer Li-Ion batteries accompanied by proper chargers present incomparably lower probability of combustion than "naked" Li-Poly cells used by RC enthusiasts. Otherwise, we'd have to charge our cell phones, photo cameras and laptops in fire-resistant metal boxes.

As I said above, whether this specific setup implements all standard protections - I don't know. If it doesn't, then a better idea would be to stop using it entirely, instead of having to implement some abnormal fire safety precautions every time the pack is charged.