It was a blower, a leaf blower, powered by a Lithium Ion battery pack, that was 10 years old. Sam from a 3rd world country in southeast Asia where they use everything until it breaks, then fix it, and keep using it, because they do not have a lot of money to buy new things, so they instead fix what they have and keep it going as long as possible.
He had no idea that the failure mode of NCA the kind in his battery electric blower, was venting with flame, and the battery pack was 56 volts, all those battery cells were stacked next to each other, causing thermal runaway like the Boeing Dreamliner Battery, causing heat and pressure to increasing inside the sealed housing, until the pressure and heat cause the plastic housing to expand, but in the warm moist air, that meant the contents of the battery catalyzed into an explosion that blew blue smoke and hot plastic shards into his face, neck, arms, torso, he had to be rushed to the hospital, and the burning tool dropped setting fire to his yard, which eventually reached a gas can and set fire to his house, causing a massive debacle that cost a fortune to fix, he eventually made a fully recovery.
I encourage him to litigate against the manufacture, there are supposed to be thermal fuses inside a large battery pack like that, that under failure conditions disconnect the cells from each other, to prevent a thermal runaway, it also required by law to have a BMS or battery management computer, that is a safety device for lithium ion batteries to disconnect then if they go too low voltage or too high voltage or short, to prevent lithium battery fires, which go very wrong when the battery pack a 1600 lbs NCA unit with 7000 cells in a Telsa model whatever the F, I hate Tesla for its horrendous customer service, and many Tesla drivers drive like BMW drivers, like they own the road more than other people, that they deserve to be on the road more than you, arrogant dick heads, who drive Tesla like sociopathic weirdos, who care only about themselves and their money and no one and nothing else.
My former coworker Geiger, was driving a fully loaded Tesla Model 3 at 7am on Inglewood Hill road in Redmond, on his way to work, with FSD activated, he was distracted reading, but had his hand on the wheel gently, all was fine, but suddenly it speed up and changed lanes into the oncoming lane, the car behind sped up block from reentering the lane of travel, now facing a car coming up the hill directly at it, it had no way out but to steer off the roadway, which ended up hitting the corner of a fence, made with a 4X8 pressure treated board, shoved up and back through the front window of the Model 3 and into the eye socket and brain of Mr. Geiger, who had to have 8+ reconstructive surgeries to fix his face, and made a mostly full recovery, incredibly. Elon Musk 10 years ago promised Tesla FSD would be Level 5 autonomy by 2026, yet even with the latest software its not more than L2.7 and only in best case situations, mostly on the freeway, mostly in fair weather.
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