Dead batteries - with odd charging circuitry
14:45
Inside a new style eBay tool battery - with schematic
30:00
Using salvaged lithium cells to power LEDs directly. (with protection test)
32:22
Top 100 Construction Tips and Hacks That Can Save Your Career | Best Of The Year Trending Machine !
27:19
Inside a recalled Amazon Basics power bank.
21:27
Can You Revive a Dead Battery Using a Welder
12:29
"Salt" Batteries are FINALLY Here?! Sooo should you use them?
40:26
Two Brand New But Faulty Plasma Cutters - Can I Fix Them?
33:46