Using salvaged lithium cells to power LEDs directly. (with protection test)

JUGEE battery teardown full size video.

Reverse engineering of shady lithium button cell charger.

Why It Was Almost Impossible to Make the Blue LED

Teardown of a faulty Samsung lithium 18650 cell. (2200mAh)

Fixing a faulty USB power supply.

Making superconductors

Scary work incidents and other answers (with more LEDs.)

Hig Power Excellent Short Circuit Protection

11 Of The Most Faked Foods In The World | Big Business | BI Marathon

Repacking Makita 18v Lithium battery with New Cells (Save $$$'s)

Build your own solar battery and save thousands $$$

Q&A while making a custom LED lamp. (storytime)

Recycling disposable vape batteries into something useful.

DIY: Lithium 18650 Cells Charger By Using TP4056 Modules

Modifying an old light with LED tape.

SolidWorks RE Tutorial #320 : Car Engine complete video (2 turbo V6) - (advanced assembly)

Are over-discharged lithium cells safe? (And how to test for damage.)

Dodgy mains emergency light. Full build and schematic.

Building 24V/10Ah Li-Ion battery pack

Simplest solar light possible, using old phone battery.