Lithium Puffed-up laptop battery
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3D3DPuffed-up laptop battery.
Defective lithium laptop battery that puffed up to twice its normal thickness. Here you can see a second one taken out of its outer casing:

Source: Theodore Gray
Contributor: Wolfram Research
Acquired: 1 January, 2007
Text Updated: 17 February, 2007
Price: $100
Size: 7"
Purity: <5%