Episode 48 | The angler’s arms are all red

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

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

Repairing a Philips shaver with a new battery so it lasts another 10 years. After years of use it died a few minutes after charging; now with a higher-capacity cell it runs twice as long as new

First-person, immersive — how to fix a speaker that won’t turn on

Spot-welding power-bank cells with the AWithZ portable welder. Spot-welding power-bank cells with the AWithZ portable welder. After long use a power bank's capacity drops. A shame to throw it away; swap in a few high-capacity cells and it works again

Flyco clipper battery died, replaced with a portable spot welder. Dug an old-stock Flyco clipper out of the warehouse, battery gone, needed new cells; none of the flat-top cells I bought reached 400 capacity, so I had to buy button-top, which have plenty — fitted them, and it now runs twice as long as new. The portable spot welder works great too, welds very solid

Appliance repair ep. 258: Xiaomi car washer battery replacement

Appliance repair ep. 259: replacing a vacuum cleaner battery

Once you’ve mastered hand-building Li-ion packs you’ll never buy a power bank again — all the old power banks at home can be re-celled! Haha

How to build a 12V outdoor-power Li-ion pack from 18650 cells

No flashlight repair today — replacing the 18650s inside a Milwaukee 12V battery

Repairing a Boda cordless drill: new Li-ion cells, spot-welded pack assembly. A friend was about to throw out a dead drill — both batteries dead, the drill dead too, only the charger worked. I fixed it, so I’m not giving it back, I’ll use it myself

Building a 12V off-grid pack from 18650

Flyco shaver battery swap — a brand-new shaver gets a bigger battery first, so one charge lasts more than twice as long

New battery for a soldering iron

Swapping a flashlight battery with a handheld mini Li-ion spot welder. The handheld mini welder is easy to carry and works for re-celling power banks, players and other small gadgets. Solder a Li-ion cell with an iron and the heat raises the pressure inside and can ruin the cell — only a spot welder will do