Swaytronic rechargeable white/black. Application. The Swaytronic battery shrink hose in shrink ratio 2 : 1 is the high quality all-rounder. It is alcohol and acid resistant and is made of high quality PVC. The film is used to protect and insulate rechargeable batteries and electronic components.... Customer benefits. You want to know which Schrink fits best on your battery? No problem.you can find the right shrink directly with the following formula:(width of the battery in mm) + (height of the battery in mm) x 1.05 = required width of the shrink in mmShrink temperature: 130 - 160 degreesShrink rate:2:1Shrink rate:46%-52% (horizontal), 10%-20% (vertical)Unit:Available per linear meter