If you lose or break the power adapter that came with your MacBook Air or MacBook Pro, make sure to replace it with a charger that meets or exceeds the machine’s required wattage. A charger with too low a wattage may result in little or no charging (or even battery drain while working), and it certainly won’t enable fast charging. You can check the adapter’s wattage by reading the fine print on the charger itself, or by opening the System Information app (in the Applications/Utilities folder) and checking the AC Charger section in the Power screen. It’s safe to use an adapter with a higher wattage than required, but we don’t recommend going below the wattages of Apple’s included adapters:

• 13-inch MacBook Air: 30 or 35 watts standard, 67 watts for fast charging
• 15-inch MacBook Air: 35 watts standard, 70 watts for fast charging
• 14-inch MacBook Pro: 67 or 70 watts standard, or 96 watts for the Pro and Max chips, 96 watts for fast charging
• 16-inch MacBook Pro: 140 watts for both standard and fast charging

(Featured image by iStock.com/Isaac Lee)

Social Media: Lost your MacBook charger? Don’t grab just any USB power adapter—using one that’s too weak can result in no charging, glacial charging, or battery drain while you work. Here’s the minimum wattage you need for each MacBook model.