Using salvaged lithium cells to power LEDs directly. (with protection test)
36:37
JUGEE battery teardown full size video.
44:59
Reverse engineering of shady lithium button cell charger.
16:08
Cheap power pack with free lithium cells (USB or solar charging)
30:01
Broken trunnion bushing repair, expert repair of damaged truck trunnion bushing
37:04
Teardown of a faulty Samsung lithium 18650 cell. (2200mAh)
26:58
Simplest solar light possible, using old phone battery.
33:13
How to make an authentic Joule Thief.
15:51