Episode 48 | The angler’s arms are all red

Class is in session, everyone — the ‘Whampoa Academy’ of the tool world

Ep. 37 | Batteries? I can’t repair them, but I can build them

Can't fix it, but I'll build it — POV hand-made pack

Ep. 41 | Whatever you like watching, I’ll make it — what else can I do

Ep. 56 | Reborn as the ancient Greek god of labelling

Ep. 37 | A high-capacity power bank this easy? Build one at home for ¥20-odd — a huge-capacity, honestly rated power bank worth ¥100+

Building a 32140 LiFePO4 battery

DIY high-power flashlight tutorial: three 18650 cells and an e-bike headlight for under ¥20

Universal magnetic base build guide — the step-by-step build guide for the universal magnetic base is here

Ep. 5 | Tearing down a ¥20 Pinduoduo brushless folding mini fan — incredible value

Ep. 5 | Teardown of a ¥20 Pinduoduo brushless folding mini fan — surprisingly good value

A primary-school kid builds a 20,000mAh power bank — a 20,000mAh high-capacity, fully transparent cyberpunk-style one for a neighbor

7.4V glue-stick mini fan tutorial, adjustable speed

A big power bank this easy? ~¥20 at home

DIY flashlight — 3×18650 + e-bike LED, under ¥20

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

A programmer goes home and fixes appliances for the old folks? I’m an embedded automation full-stack developer, and I repair appliances for the elderly in my hometown

Ep. 2 | Spot welder comparison — a home-built one off Xianyu vs a bought one! Money talks! The quality really is different

Building a 24V Li-ion battery from 16 × 32140 cells

DIY an ultra-long-runtime seven-color night light? For the last science maker class of the term, I hand-built an ultra-long-runtime seven-color night light as a gift for my students

Unboxing and testing a small handheld spot welder — very practical and handy

Why does a 48V e-bike Li-ion battery have such short range?

Universal magnetic base — step-by-step

Trash to treasure? Making my own solder-fume extractor! The perfect weld

Ep. 61 | Last time a friend asked for one made from 18650s — today we build it; the full build is in the video, please watch patiently

You can build a lithium pack at home

The ¥9.9 mini fan I bought last year stopped charging — repaired with one bigger cell, no more runtime anxiety! The same home battery welder as in the video is in my shop window

Lithium batteries, spot welder — I recommend this one, compact and powerful

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