DIY Li-Ion Battery Packs // Sequre SQ-SW1 Spot Welder // Samsung 30T 21700

DISCLAIMER - lithium batteries are very dangerous if mistreated, take it slow & do plenty of research before working with them!

The spot welder is the Sequre SQ-SW1 (also sold as the Flipsky FS-SW1) running from a Turnigy Rapid 5500mAh 3S2P 140C hardcase lipo, settings in the video were 40ms with 20% preheat & the nickel strip is 0.2mm pure/solid nickel (*not* nickel plated steel).

The cells are Samsung INR21700-30T, you can read a proper review on lygte-info.dk -

https://lygte-info.dk/review/batteries2012/Samsung%20INR21700-30T%203000mAh%20%28Gray%29%20UK.html

3D printed end caps came from Thingiverse, there are a bunch of designs to choose from. Remember you can use a 18650 design for 21700 cells if you just play with the scale!

Music -
Psalm Trees, Guillaume Muschalle - Holding No Hands https://chll.to/c25df92e

Видео DIY Li-Ion Battery Packs // Sequre SQ-SW1 Spot Welder // Samsung 30T 21700 канала CJ Davies