What does it cost? The MacBook Pro 16-inch M4 Pro starts at $2,499 ... Apple promised up to 24 hours of battery life for its new M4 MacBooks. While that might sound outlandish, the MacBook Pro ...

Batteries will lose efficiency over time so don’t expect a 2009-era MacBook battery to still possess the same power as it did when it was new or more ... M1, M2 Pro, M3, M4) MacBooks.