i only charged my 18650 twice, and i'm noticing the negative side of wrapper already wearing thin. how often do you change the wrapper on the new battery?
I don't think changing the wrappers is something you should have to worry about.I'm not sure how you would go about replacing a battery wrapper.
Its not necessarily cheap or bad mods. I have a hexohm that the negative contacts in the battery sled would grab the wrapper. Its since been modified but it did tear a few wrappers. Any exposed metal that's not supposed to be exposed is a bad deal. Changing the wrapper is safe and easy. Not to mention cheap. All you need is a hair dryer.