Originally Posted by
Lemain
henra -- Where did you get that science from?
Personal experiments with Lithium Batteries of different types.
Trying how much you can squeeze out of them will lead you to increase voltage.
Charging them to an increased voltage additionally increases stored (and usable) capacity in these cells tremendously. Stored energy product increses massively. Up to the point were they blow up.
Emptying them (especially under high load) below a certain threshold will also damage chemistry. The consequences of this will become obvious when charging the next time.
Therefore balancers plus cut-off with monitoring of each individual cell are important for charging in case a cell is defective. Plus ideally continuous monitoring of voltage during discharging in order to prevent damage to cells. They have an operating window with a lower and an upper limit. Outside that window cells are damaged. That said self ignition will only occur above a certain level of energy in the cell.