More accurate is, if a Lithium battery that is to be charged within the device it is used in did not have protection circuitrybuilt in....

I use lithium batteries for another hobby. They do not have built in circuitry as all they are are batteries. I have to use a seperate dedicated llithium charger to charge. Set the charger wrong and you will overcharge and burn your house down, your garage down, and there has even been instances of burning cars up because it is common (though not recommended) for people to use a car's 12v system as a power source for charging.

Not just overcharging but if I crash my airplane and damage the battery i can violently catch fire and catch anything at the crash site on fire. If the damage is minor and I don't notice it and continu using the battery, it can catch fire during charging correctly the next time.