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+

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

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

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

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

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

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

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

Beginner’s money-saving guide to hand-building lithium packs

Build your own portable knife-sharpening gadget that every home needs? Kitchen knife gone blunt? Build a portable belt grinder on the cheap and never worry about a dull knife again

A ¥25 ‘brushless’ handheld car vacuum bought online — opened up, it really is a brushless motor

AWithZ U3 welder — build your own 18650 pack, tutorial

DiY

Homemade jump starter: a DIY car emergency power supply, turning a bought Bluetooth-speaker shell into a car jump-start pack

Homemade jump starter, DIY car emergency power — turning a bought Bluetooth speaker shell into a car jump pack

Sharing a handy DIY tool today: the AWithZ handheld spot welder

A home-made jump starter from 18650 cells — only 2C cells, picked up for ¥20-odd on the Douyin store; DIY car emergency power, built into a bought Bluetooth-speaker shell