New DIY Storage Box Holder Case For 2 X 18650 3.7V Rechargeable Battery 4 Pin Description: 18650 Battery Holder Case with 6" leads for soldering / connecting. Takes 2 standard size 18650 batteries side by side to form a compact battery of 3.7V rechargeables Keep your batteries organized and protected Specification: Material:ABS Color:Black Original Box:NO Size: Approx.78mm * 40mm * 21.5mm (excluding the lead part) Weight:Approx.15g Pin: length Approx.3.5mm, longitudinal spacing:Approx.72.5mm (both edge-to-edge spacing) Mounting holes: Aperture Approx.3mm, longitudinal spacing Approx.55mm (Pitch is the distance center to center of aperture) Instructions for use: 2 *18650 battery, in parallel or in series to achieve 3.7-7.4V