I have had the few wireless Dyson. They start dying very quickly. I went back to wired. A bit less convenient but a whole lot stronger
You gotta claim a new battery while you're still under warranty, two years.
Whats with Costco? They have an unlimited return policy?
Are you Jewish? They have a very favorable return policy that many abuse. I don't. But I will return if there is a valid reason. Even a few years later