MWC 2024's Wildest Phones: Edible Razr, Bracelet 'Phones' and One Big Battery

We've seen lots of phones advertise big battery life. But we don't usually see a battery that advertises how it can be a big phone. But at Mobile World Congress, the company Avenir has developed an Energizer branded device that theoretically keeps going and going with a 28,000mAh battery. For comparison, a 5,000mAh battery is considered a large for a phone. The Energizer Hard Case P28K's battery comes with a 6.78-inch display, a 60-megapixel main camera, IP69-rating for water and dust resistance and a three-year warranty. Unlike a lot of the concepts we're seeing at MWC, Avenir reportedly does plan to sell this battery-with-a-phone. It's said to go on sale this October for $300.