This 28,000 mAh Energizer Phone Just Keeps Going, and Going

The phone-slash-power bank was unveiled during Mobile World Congress. But it's definitely not light.

Abrar Al-Heeti Technology Reporter
Abrar Al-Heeti is a technology reporter for CNET, with an interest in phones, streaming, internet trends, entertainment, pop culture and digital accessibility. She's also worked for CNET's video, culture and news teams. She graduated with bachelor's and master's degrees in journalism from the University of Illinois at Urbana-Champaign. Though Illinois is home, she now loves San Francisco -- steep inclines and all.
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Abrar Al-Heeti
2 min read
The filming of an Energizer Bunny Commercial
Bob Riha, Jr./Getty Images

In a world where smartphone batteries hardly last more than a day, Avenir Telecom conjured up a device with a 28,000 mAh battery, which the company says can last for up to a week. The catch: It's a brick, clocking in at about three times the thickness of an iPhone 15

Avenir unveiled the phone at Mobile World Congress in Barcelona on Monday, calling it the Energizer Hard Case P28K -- it licenses the name from the battery manufacturer. The Hard Case P28K has three rear cameras (60, 20 and 2 megapixels), a 16-megapixel front camera, and can shoot 4K video. It sports an 6.78-inch, 1080p screen and an IP69 rating. It can reportedly be fast charged at up to 33 watts, and comes with a 36-watt charger. 

By comparison, the Samsung Galaxy S24, whose battery life we absolutely loved, has a 4,000 mAh battery. Plenty more goes into battery life than just pure amp-hours but promising this thing could last a week is not far-fetched, based purely on the numbers.

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The tradeoff for ridiculous battery life is a relatively more primitive mobile experience, since the Hard Case P28K doesn't even have 5G. According to The Verge, the processor is a MediaTek MT6789, and the phone runs on Android 14. There's 8GB of RAM and 256GB of storage. And at 27.8 millimeters (1.1 inches) thick and 570 grams, it'll definitely weigh down your pockets (if it even fits).

The device will reportedly go on sale in October, for just under $300. Avenir told Android Authority the phone is geared toward countries without a regular power supply, and isn't slated for a US release. The company didn't immediately respond to a request for more information; our team on the ground in Barcelona is trying to get their hands on it right now.

There have been a host of other unique concepts and products at this year's MWC, including phones that can wrap around your wrist, a Barbie Flip Phone and the unveiling of the OnePlus Watch 2

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