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.
My dog chewed on one of my Buds 2 Pro earpiece after owning them for two months cause I left the door open. Managed to open the case and everything lol