18650 Lithium Battery Positive End Insulation Pads Barley Fish Paper

18650 Lithium Battery Positive End Insulation Pads Barley Paper. Also known as Fish paper. They are pre-cut self-adhesive rings you just peel off and stick to the positive end of the cell. 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. They are not super sticky, but nickel strips when spot-fielded will keep the rings securely in place.