Dead batteries - with odd charging circuitry
15:48
Horrific LED tester that can literally kill you - (with scary schematic)
21:13
"Miracle" heater teardown - with schematics
10:08
Dumfume Battery Teardown, $99.95 Black Friday Special, Good Deal or Bad?
16:13
Duracell PowerCheck: A genius idea which didn't last that long
15:08
More vaguely-informative ramblings about low pressure sodium lamps
27:19
Inside a recalled Amazon Basics power bank.
32:22
Top 100 Construction Tips and Hacks That Can Save Your Career | Best Of The Year Trending Machine !
12:29