I use them to differentiate between married sets of 18650's.
They work great and look cool to boot.
Awesome designs, way better that standard plain colours
good product, vaping in style now, although they cant be seen ;)
I Use these battery wrap to pair up my battery's in sets, so they are always paired together when charging or using them in my Mods, another benefit is they take 30 sec to install and offer another level of protection to possibly the most dangerous part of your Vaping arsenal.
ever noticed that your batteries (no matter how well you look after them) get little rips or nicks in the wrap? this can be as simple as a little piece ripped by inserting your battery into your mod. well that's where these come in!
They replace your torn/damaged wraps and breath fun and new life back into your batteries. They are also useful to differentiate between who owns them (my wife will leave my minions alone now) :-)