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February 24, 2016 09:16 am PST
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/h30Os4C7Spk/fellow-opens-a-700-battery-pa.html
Fellow opens a $700 battery pack, finds a large sponge and a little $30 battery inside
The lithium battery pack for a Nagra 6 digital recorder costs $700. Markus Fuller opened one and found out it has a small battery in it (with 6 cells worth a total of $30), and a large sponge. It must be an awesome sponge! As he opens it, he gives an interesting and entertaining lesson on the history of lithium batteries.
Caveat emptor: Nagra sells a more expensive battery pack, which contains more batteries, so you won't get as much of the magical sponge if you buy it.
Fuller has a good video about capacitors, too:https://www.youtube.com/channel/UCx36Uxaf_LHo635bK6kSCPQ
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Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/h30Os4C7Spk/fellow-opens-a-700-battery-pa.html
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