Thats is what i mean, those cheap ones will burn,
for the expensive ones you dont wanto try to find out.
Its saver to say they dont prevent fire, instead of thinking the fire will stay inside.
Besides you should always keep eye on the lipo charging,
before it goes wrong you will see the lipo swelling, or smelling maybe a bit smoke,
you wont see that before it goes totally wrong inside a lipo bag,
i better charge when i can see them, or am i wrong ?