18650 Battery Box - 2 Cells

I modified the original to include a read out for voltage and for two cells. Added a balance plug for charging.

Parts:
Push Button Momentary Switch: https://smile.amazon.com/gp/product/B07DF78VJ7/ref=oh_aui_detailpage_o03_?ie=UTF8&psc=1
2 Slot Double Series 18650 Battery Holder: https://www.banggood.com/3pcs-New-Version-DC-7_4V-2-Slot-Double-Series-18650-Battery-Holder-Box-Case-With-2-Leads-And-Spring-p-1272740.html?rmmds=myorder
2S 3Pin Balance Cable: https://www.banggood.com/10PCS-2_54XH