1m Self Adhesive Green Barley Fish Paper For Li-ion Battery Pack Insulation

1m Self Adhesive Green Barley Paper For Li-ion Battery Pack Insulation. Also known as Fish tape. Insulation is the most IMPORTANT safety part when you build your own battery pack. Insulate every bit that can cause a short circuit. Think that parts and materials can move and vibrate while you actively using your DIY battery. The height of 18650 cells is 65mm.