I've seen smartphones with some pretty big batteries, the biggest probably being theDoogee S100 Pro with its colossal 22,000mAh battery. But a new smartphone unveiled at MWC 2024 has that one beat.

This week, Avenir demoed a new smartphone at Mobile World Congress in Barcelona called the Energizer Hard Case P28K. It's basically a phone that's built around a power bank.

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Confused about the name? That's understandable. Avenir has licensed the Energizer name from the battery manufacturer. 

The spec sheet for the Energizer Hard Case P28K is rather bland: 

• 6.78-inch, 1080p LCD display
• Android 14
• MediaTek Helio G99 MT6789 octa-core processor
• 8GB RAM
• 256GB storage, 
• 60-, 20- and 2-megapixel rear camera
• 16-megapixel front-facing camera
• 4G support (no 5G)
• IP69 rating
  

But then you get to the battery, and things get weird!

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The battery is a mammoth 28,000 mAh battery, giving the handset a talk time of almost 5 days, and a standby time of close to 100 days.

That's nuts! 

But with great battery capacity comes great size. This thing is 1.1 inches thick, or to put that another way, three times the thickness of an iPhone 15, and it weighs 1.25 pounds. Unless you've got big, deep, pockets (and a good belt) this thing isn't going in your pocket. 

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I did some digging around on this, and it seems that it's planned to go on sale in October and will cost about$270. However, and somewhat oddly, Avenir doesn't have plans to release this behemoth in the US. 

So if you want to get your hands on a smartphone with a giant battery today, then theDoogee S100 Pro is the handset for you (and it's currently on sale for nearly 30% off on Amazon Prime). It's the same thickness, but lighter (0.88 pounds) so it's a little easier on your pockets. It also offers up to almost 98 days of standby time.

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