LiPo vs NiCad
Several aircraft were lost with NiCad Runaway, most any battery including SLA can do it. The key is the charging and protection system, Gulfstream 680 has some LiFePo4 on it.
One solution is to have a low power charger for each cell and diode isolate the pack from the power buss. It is a brute force way to prevent thermal runaway of a whole pack. I think this is the Gulfstream implementation. A drawback is don’t get the real fast recharge rate the Li-Ion can provide.