Technology has changed over the 15-20 years I have been doing electrics seriously. They used to be much more prone to explosive disassembly even using conservative charge methods, almost have to seriously abuse them currently. Inspect for any or all physical damage before charge, place somewhere they won't affect anything else. My self I wouldn't put more than one in a box to charge, and check for puffing or extra warmth after the charge indicator says It's done. If it's hot, puffy, suspect it to be damaged. Ammo boxes are cheap, 1/2 concrete end blocks ditto. Haven't had a fire with lipo4, lots of nicad fires, one dry cell fire airborne.
Multi cells are prone to inbalance also, the weak cell is the fire starter. I would save the damaged ones for a fire demonstration out doors if management would allow it.
