Second version of my low-cost DIY soldering iron: upgraded to Li-ion power plus a printed shell, more convenient to use

AWithZ UF20B supercapacitor spot welder: small size, big power

Hand-building FPV drone packs, part 1! Not easy to make

Cells dead after two years without charging — repairing a Xiluopu scooter Li-ion battery

Ep. 178 | The welding pen’s lead blew up on me before, mates. On a viewer’s recommendation, it gets a jacket — feels a lot safer

A follower asked whether the AWithZ UF20B can weld copper stacked directly; I said probably not, he said support says it can with flux. Fine — if you don’t believe me, don’t ask me again, the video is right here, see for yourself. The welder is the AWithZ UF20B from my showcase, upgraded No. 6 welding pen: copper straight on vs copper on a nickel base. Also found some followers haven’t even figured out nickel base layers… mainly I turned the power bank into a 30000mAh one, and it’s a joy

Never serve low-end customers — deep down they don’t recognise your value

AWithZ spot welder gears 1–5, weld quality test

Episode 183 | When you want nothing and nothing matters, what do you do? Keep sinking, or look for something that makes you happy and try to cheer up! Life is just an experience — make sure you enjoy it