I’d echo these observations. The battery life is terrible. The suggested battery upgrade can only be done on higher computer software on my MAC. I’m retired and see no need to upgrade my Mac (I’d lose some programs.) Inquiries to support have been unanswered. I’ve lost days of data due to the Whoop locking up and the green light turning off, never happened in Whoop 3.0. Was very happy with 3.0. maybe they will get the bugs out of 4.0. If not I will not be renewing either.
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