How to make a MINI soldering iron with 18650 lithium battery part2 - Change to 2 x 18650

How to make a MINI soldering iron with 18650 lithium battery
Last time I made an 18650 lithium battery-powered electric soldering iron, now I changed it to 2 18650 power supply.
More power and faster heating.

Previous video - How to make a MINI soldering iron with 18650 lithium battery :    • How to make a MINI soldering iron wit...  

Materials and buy links
Mini USB soldering iron : https://bit.ly/369Clnl
Replacement Soldering Iron Tip : https://bit.ly/2DUxgmD
2S Lithium Battery Charge Protection Board BMS : https://bit.ly/2ZrCe4s
4 Slots 18650 Battery Holder Plastic Case : https://bit.ly/2PRD07t
NCR18650B 3400mAH Lithium Battery : https://bit.ly/31XBrbW or https://bit.ly/34Suz0b
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