This is good, I agree, but I have one major criticism: no mention of safety concerns for running non-rechargeable lithium batteries like the CR123 in series. T

This is good, I agree, but I have one major criticism: no mention of safety concerns for running non-rechargeable lithium batteries like the CR123 in series. There are some true horror stories out there from people who have suffered chemical burns and permanent lung damage, even hydrogen fluoride poisoning just from operating those normally, with a manufacturing fault in one of the cells.