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DIY · 21700Real builds and repairs made with AWithZ welders. Each project has a step-by-step digest with key frames, a welding recipe card and comment insights extracted from the original video.
Building a car jump-starter power bank from 8 tabless Ampace JP40 cells06:29
Building a car jump-starter power bank from 8 tabless Ampace JP40 cells
Xiao Wa39777913535
Teaching you the 8-cell car jump starter02:30
Teaching you the 8-cell car jump starter
Xiao Wa28328921972
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 runtime10:49
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
GGoodnight1288159716
Modding an iPhone battery to 20,000mAh — a week of runtime05:23
Modding an iPhone battery to 20,000mAh — a week of runtime
GGoodnight46636185
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 next08:43
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
Doomsday Lab31475137
No more slow phone charging — for under ¥100 I built a 100W flash-charge power bank that supports multiple fast-charge protocols09:29
No more slow phone charging — for under ¥100 I built a 100W flash-charge power bank that supports multiple fast-charge protocols
GGoodnight33343122