ThreeBulls 100pcs 5 Color 33mm PVC Heat Shrink Tubing Tube for 20700 Battery Shrink Film

With some WORK and a few curse words, these will fit on a 21700 battery - it's a struggle, but it can be done. They are tight fitting, but I got it to fit nicely on a 21700 that needed to be rewrapped, see photos.

These worked perfectly for me on my 20700 batts. No fuss, no muss. Quick and simple with a heat gun and a perfect fit.They are a really good price for basic and simple wraps that just work. Would buy again (but probably won't need to for a long time with 100 of them)

Some reviews said it will work just fine. It does if you can get it onto the battery. Good luck. Third time's the charm, I guess. I chucked the rest in the garbage.

work great. Do not come with insulators

worked well liked it

Good product. Cut perfectly. Product does what it says it does.

Overall these are great, but the blue ones are too small to fit the battery.

They work fine for my batteries a little to long.