A 13-inch MacBook Air has a battery capacity of around 50Wh. The 16-inch MacBook Pro’s battery is rated at nearly twice that—just under 100Wh. To find out the Wh rating of your MacBook ...
Once you have the tool kit, you'll need a replacement battery ... If you want to change the battery on a MacBook Air or Pro, the process is similar to that of a PC. It's all about opening up ...