You must have gotten a dud because my qc45s last much longer than my 35s. I’ve been using them 8 hours a day for years too. So much in fact I replaced the “unre

You must have gotten a dud because my qc45s last much longer than my 35s. I’ve been using them 8 hours a day for years too. So much in fact I replaced the “unreplaceable” battery in my 35’s.