With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
Don’t wanna be a whiner but wireless in ears never last long enough for me. I’m forced to stop using them after a while because they need to be charged. Even a 2 and a half hour phone call is enough to deplete them. This is a non existing problem with wired ones