I will try to make this quick and easy !
If your batteries look like this no need to throw them out . Re-wrap them and give them a second chance at life.
You will need to buy battery wraps or heat shrink tubing 18mmX68mm most vape shops sell battery wraps around $1. If they are not available at your local vape shop I picked mine up from amazon for around $10 for 500 wraps .
You will also need a heat source (lighter , heat gun )
Paper towels to clean your battery
Scissors to trim the battery wraps to size.(if needed)
1st Remove the old battery wrap and set the plastic insulator to side you will need this later.
Do not use a knife here you can cause a short and have you battery vent which can be dangerous.
Do us your finger nails it should peel right off with little to no effort
2nd inspect battery for any damage (disregard battery if it is damaged)
3rd clean battery of any dirt or gunk
4th Slide the wrap around the battery making sure you have even coverage on either side of the battery
if you have to much over hang you will need to trim some of the wrap with your scissors. start by trimming a little because you can always cut more off if needed.
5th After insuring a good fit you will need to add the plastic insulator you set off to the side earlier. Now slowly heat the battery wrap. I used a lighter here I like to start on the positive side of the battery slow working down to the negative.
Make sure the flame does not touch the battery wrap because it can catch on fire if you are not careful
Your battery wrap should conform to the battery wrapping its shelf around the positive and negative of the battery
That is it your battery is now wrapped ! Clean up your mess and enjoy your newly wrapped battery.
Please feel free to comment if you have any questions or advice . Thanks steem on!