18650 Battery Wrap
Generally, by the time the wrap comes off, its time for new batteries. However, accidents happen and you can tear your wrapping which is dangerous!
Take off the old wrap.
Save the plastic/paper ring on the positive end.
Slide the new wrap over the old battery.
Put the paper/plastic ring back on the positive side.
Use a hair dryer to shrink the wrap onto battery.
Colors may vary slighty from photos.