Does the job of protecting the battery, but the shrinkage is uneven. You can see the line where it was glued together to form the tube as well as the crease.
Heating to shrink the curved edges left bulges in the packaging which caused them not to fully adhere to the batteries. I went through 3 sets of wrappers to fix this.
It's like a tattoo for your batteries. Make sure you fully charge your batteries before changing your image. I made the mistake of only swapping out one of the batteries and found that she liked the look before I took it on and swapped it out. Now it's kind of weird between the battery and me.