Apple is preparing its first MacBook powered by Apple Silicon, which may blow away today's best laptops in terms of battery life, while offering the same or better performance as Windows laptops.

According to Komiya on Twitter, the ARM MacBook will cost only $849 and should last 15-20 hours on a charge; according to another report by The China Times via MacRumors, the laptop will be powered by an A14X processor and will be available in a range of sizes, including a 4.5" x 4.5" laptop and a 4.5" x 4" laptop, expected to be available by the end of this year, citing equally impressive battery figures.

According to Komiya's leak, the Apple Silicon-powered MacBook will feature a 12-inch Retina display in a lightweight 2-pound design, similar to the previous 12-inch MacBook.

The China Times report also predicts that it will have a 12-inch display and weigh less than 1 kilogram (2.2 pounds). The A14X processor, codenamed Tonga, will have an ARM architecture and TSMC's 5nm manufacturing process that will enable 15 to 20 hours of battery life; the A14X chip will reportedly also be used in the upcoming iPad Pro tablet.

This is a significant improvement since previous Intel-powered MacBooks had batteries that lasted less than 9 hours. By comparison, the Dell XPS 13 1080p model lasted 12 minutes 39 seconds in a web surfing test, while the 4K model lasted 8 minutes 14 seconds. The latest MacBook Air was 9 minutes 31 seconds and the 13-inch MacBook Pro was 10 minutes 21 seconds.

Other leaked specs for the new ARM MacBooks include 8GB or 16GB of RAM and 256GB, 512GB, or 1TB of storage. Unfortunately, according to Komiya, the system will only have a single USB-C port and a low-resolution 720p webcam.

The biggest concern we have with Komiya's MacBook leak is that it predicts a fourth-generation Butterfly keyboard. Apple has abandoned this keyboard in favor of the Magic Keyboard with scissor switches on the latest MacBook Pro and MacBook Air. So Apple will have to make some serious improvements this time around to reassure shoppers.

According to leaked Apple Silicon benchmarks from Apple's Development Transition Kit for Apple Silicon, it has already outperformed the MacBook Air on Geekbench 5. We expect the A14X to be significantly faster.

In other words, Windows laptops could be in trouble.