The battery's capacity is significantly reduced The battery's capacity is significantly reduced for my 2019 MacBook Pro laptop. What options do I have other than replacing it with a new battery? 406 1; 1 reply. Loading page content. Page content loaded. User profile for user: PRP_53. I have a 2014 MacBook Air here running Big Sur 11.1 and I keep it on the charger most of the time, as otherwise, it too results in about a 4.5 to 5 hour battery run. battery capacity significantly reduced on macbook after installihng big sur 11.1. Anyone found anyway to fix this. I cant take it to a service provider as they are all closed due.

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Well, batteries lose capacity as a result of age (time) and usage (cycle count). The battery capacity is measurable by the system. The alert you're seeing, based on the phrasing, refers to when it drops substantially. 80% is the warrantied threshold (if you have an active warranty) so it's unsurprising the system alerts when it's that low. -. Battery drain with macOS Catalina. 1. Update your Mac to the latest version of the macOS software. Also, make sure that all of your apps are up to date. 2. Simply restart your Mac by going to the Apple menu and Restart. 3. Check your battery health. The general condition of your battery may be poor.