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Speaking of steel containers, the other day I collected up all the unused devices around my house that use lithium ion batteries, and put them all into a military surplus stainless steel drum in my garage. Normally they only burst into uncontrollable flames while charging or discharging quickly, but there's still danger if they become fully drained.Garbage Can and Ammo Can as Faraday shields
More videos from empdoctor.
Testing Garbage Cans and EMP Bags
Garbage Can without Tape: 18 dB shielding
Garbage Can with Tape: 40 dB shielding
Gaskets to Seal Faraday Cage
Garbage Can without gasket: 17 dB shielding
Garbage Can with gasket: 52 dB shielding
Ammo Can Faraday Cage
Ammo Can without gasket: 28 dB shielding
Ammo Can with gasket: 74 dB shielding
The shielding measured in the above videos using garbage cans using tape or a gasket is good (40 or 52), but it not as effective as the best Faraday bags (> 80). But, the shielding you get from the can gets added to the shielding you get from the bags inside, provided the can is insulated from the bags.
The ammo can works better than the garbage can, but of course holds less.
dB (decibels) is not linear. 20dB is 10 times greater than 10dB. 30dB is 10 times greater than 20dB and 100 times greater than 10dB. 70dB is 1,000,000 times greater than 10dB. Each 10dB is tenX more.
dB does not have units, it is a ratio. If I am comparing 1000 W to 1 W, the ratio is 1000:1, or 30 dB.
I also wonder about their safety if they are hit with high energy radio waves, DEW, or solar flares.
China is having real problems with apartment buildings burning down because of people charging EV scooters at night, which they use for commuting to work.
Some teenager's jaw was broken by an e-cigarette exploding during a quick discharge of a tiny lithium ion battery, so it doesn't take much lithium ion to become life threatening.
I was surprised how many lithium ion battery devices I found in my house.
I used to play with RC rock crawlers, and those lithium ion batteries are so dangerous you have to charge them in a fireproof location.