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As fun as it is to dunk on Elmo I think we both know it's not the seat foam that's the problem there. 😅
I'm actually right now in the process of developing design criteria for a battery testing lab, and as part of that I had to do a hazardous materials analysis. Lithium as it is in batteries is considered a water-reactive chemical, and the code only allows you to have ten pounds of it in a building before you're pushed into a special hazardous occupancy type with lots of extra fire and explosion precautions required. I ran the numbers and figured out that's about 8000 of your typical cylindrical cells -- which is right about the number of cells in a Model S. And in a Model S, you're just kinda... sittin' on 'em. Fun thought...
Only 10 pounds of lithium? I work in IT and I've probably had triple that on a desk at times (I sometimes wonder where that cardboard box of spicy pillows ran off to in my last job).
Edit: Oh that's probably raw lithium, not total weight of battery, isn't it?
Yes
Right, it's the weight of lithium inside batteries, not the weight of the batteries overall. I think the biggest laptop batteries I've seen had something like 6 16850 cells, and you'd need north of 1,300 of those laptop batteries in a building before it crossed a threshold for hazardous materials.
Well, I can say I've seen that many laptops in one place before, but definitely not in one room (outside of a warehouse and a couple larger buildings). Most I've had in a small place is a couple hundred.
I should clarify that the actual language in the building code is per control area rather than per building, and in most cases a control area only covers a single floor (and in some cases not even that, if there's a sufficient fire separation between tenants sharing a building floor). I think that the amount of lithium batteries in laptops and mobile devices is a bit of a blind spot in code enforcement these days, but from a practical standpoint it's not likely that a typical office is going to cross the threshold into hazardous-occupancy territory.
Good to know. Definitely agree, mobile device batteries really should be more controlled from a fire safety perspective, Id be surprised if most IT departments even have disposal policies for them, existing policies can also be so convoluted that it's easier to just stuff them in a cabinet and forget they exist).
I've seen laptops and phones sitting on a shelf for a year or two because disposal forms require signatures that are invalidated due to turnover, starting the process over from scratch.
Don't look at the pile of old phones and laptop batteries that's been sitting in the trunk of my car for the last month. I tried to get rid of them at a community hazardous waste event, but the computer recyclers didn't show, and they're just gathering dust at the moment...
Batteries in a hot, enclosed metal box? Wonderful 😆