Building a car jump-starter power bank from 8 tabless Ampace JP40 cells

Teaching you the 8-cell car jump starter

Spent ¥127 on a high-power flashlight that lights up a whole building — no more fear of walking at night; 15 cells give 12 hours of runtime

Ep. 30 | One video teaches you how to build a 21700 pack — never worry about long-range battery again

Got another spot welder, the AWithZ UK1 portable Li-ion spot welder — unboxing and review! Plus my experience and thoughts on spot welders 🤗 If you’re into spot welders, come have a look

Got it now? Building a 21700 Li-ion pack with an AWithZ welder

Modding an iPhone battery to 20,000mAh — a week of runtime

Build a 21700 pack in one video — long FPV range

Don’t copy this — even Wang Duoyu wouldn’t fund it

Building a car jump starter from supercapacitors + lithium cells — the cells store energy, the supercapacitors deliver the big current; 21700 4000mAh cells in 2P4S, 2.7V 360F supercapacitors, two together should push past 100A instantaneous, CCA estimated 500+, should start a 2.4L car; final assembly and test next

No more slow phone charging — for under ¥100 I built a 100W flash-charge power bank that supports multiple fast-charge protocols

Building a 21700 pack with AWithZ — full workflow

Another AWithZ UK1 — unboxing & review

AWithZ P30C spot welder — now I can build my own 21700 power packs

A post by Miduoduo314

New battery for a soldering iron