Helmet battery pack

Helmet battery pack which works as battery holder for 1x CR123, 2x AA, 2xAAA or 1x CR123, 1xAA , 4xAAA as well as counter weight Pack is secured to helmet with velcro on the back of the pack and 2mm elastic cord attached to rail screwsCover is secured to the body with 1mm thick stainless steel wire Rope and crimping sleevesKnots and crimping sleeves are reinforced with heat shrink tubes Stainless steel wire rope with crimping sleeves Amazon.com : 1mm wire ropeElastic cord Elastic Cord 2mmVelcro Amazon.com : velcroHeat shrink tubes Amazon.com : heat shrink tubing