Help. My vehicle Li-Ion battery went dead - completely dead. I put it on full charge. I was told this would put the battery on full strain. My lead acid battery was also dead so I charged it too and then It would not start so I towed it to the dealership and they say they need to replace the Li-ion Battery for 14K !!! Help. How can charging it to full charge from completly empty after being dead for two weeks cause the battery to fail ?