The Honor Magic V6 is one of the first big announcements coming out of this year’s MWC – the most impressive figures on its spec sheet are how thin it is, 4.0mm unfolded and 8.8mm folded, and how big its battery is, 6,660mAh.

The phone reaps the benefits of Honor’s partnership with battery maker ATL. Its battery features fifth-generation Silicon-Carbon (Si-C) material. It achieves a high energy density by using 25% silicon content, which is the highest in the industry, according to Honor.

As impressive as the Magic V6 battery is, Honor isn’t stopping there and is working on even thinner and more energy-dense batteries. To show off its progress, the company demonstrated the Silicon-Carbon Blade Battery, which increases the silicon content up to 32% to achieve an energy density of over 900Wh/L.

The Blade Battery is designed for future foldables that will have batteries with 7,000mAh capacity and beyond.

The “blade” in the name is quite literal, by the way, especially in the hands of Rick Smith Jr., who holds several Guinness World Records for card throwing. Here’s a short video where he basically plays real-life Fruit Ninja by slicing and dicing produce with the Blade Battery: