Are over-discharged lithium cells safe? (And how to test for damage.)
30:00
Using salvaged lithium cells to power LEDs directly. (with protection test)
21:37
Charging NiMH cells - smart vs dumb chargers
17:00
Dead batteries - with odd charging circuitry
10:44
Testing more 18650 Li-ion cells (REAL vs. FAKE)
23:11
Simple NiMH battery charger (with PCB files)
20:46
Finally! A Battery That’s Better Than Energizer and Duracell!
14:25
Poundland "disposable" phone charger.
15:48