Originally Posted by
VegasTriker
His wife owns a Jeep with starting problems so she carries on of those jump-start contraptions. It must have a pretty substantial Li-ion battery. She was charging it in a spare bedroom when it started to burn. From what he told me it produced a lot of noxious smoke and soot. He unplugged it and covered it with a fire resistant blanket while the fire department was on their way. I would never have charged anything with a substantial Li-ion battery inside the house or garage.
Those jump starters are not that big, They contain pouch cells. I bought three of them from Walmart on clearance for around $25 each in 2015. Ran them in series to power my 36V bike. Cheap power back in those days. I was always afraid of them, so I would charge them outside on the driveway. One day, it rained and the water ruined them. Better off without them.