A ten pack of 18650 battery wraps for repairing damaged battery wrapping.
Simply peel off existing battery wrap using your fingernails and then place the battery in the center of the wrap and use a hairdryer or heat gun on a low setting to heat the wrap which causes the wrap to shrink into place. Make sure the insulation ring is still on the positive end and that it is re-installed under the new wrap.
Do not use metal tools to remove the existing casing or place the battery on any kind of metal surface as you work.
Check your battery wraps regularly for any tears or rips and re-wrap immediately. Do not use batteries that have damaged wraps and do not let them come in contact with anything metal or other batteries.