Tired of your batteries loosing their shine due to dirt and debris? We're glad to offer special clear heatshrink that will keep your batteries looking fresh for months. Simply slide the heat shrink over the battery and apply a little bit of heat and you are good to go. Not only does the protective heat shrink help against dirt and debris, it also retains a little heat, perfect for keeping that internal resistance low! Each package comes with 10 pieces of protective heat shrink.