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+

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

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

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

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

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

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

[Full reveal] Hand-building a ‘TNT’ C4-style power bank! Do not take it outside

Anyone else burned by a power bank? I went for a battery spot welder — power-bank freedom! Totally hooked