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Samsung Galaxy Z Flip 4 battery boost just got tipped

An unofficial render of the Samsung Galaxy Z Flip 4, showing one partially open facing the camera, and the other mostly closed and placed in a tent-like position
(Image credit: 91Mobiles/OnLeaks)

A rumored, and much-needed, Samsung Galaxy Z Flip 4 upgrade has been given additional weight by a new piece of evidence provided by leaker IceUniverse (opens in new tab) citing MyFixGuide.

The table in the tweet, which looks to be from a regulatory document, shows one device sporting two batteries. This makes sense for the Z Flip 4 as its folding design means there's not enough room for one regular-sized phone battery. One of the cells is rated for 2,555 mAh and the other for 1,040 mAh. Adding them together gets you 3,595 mAh.

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That's higher than the 3,300 mAh capacity of the Galaxy Z Flip 3, but still below the 3,700 mAh capacity tipped by IU in this tweet and in previous leaks. This is likely because of the difference between a battery's "rated capacity" (the minimum guaranteed capacity for a device's cells) and the "typical capacity"  (the average expected size of the battery), and the figure that tech companies use in their marketing. Therefore the 3,700 mAh rumor still stands up for now.

The Galaxy Z Flip 3 offered poor battery life when we reviewed it, so a larger battery is a must-have upgrade for the Galaxy Z Flip 4. Samsung will need to make the rest of the phone more efficient as well to make this happen, but hopefully changes like the rumored use of a Snapdragon 8 Gen 1 Plus chip will help there.

Combined with other rumors for a larger outer display, and that more powerful chipset, the Galaxy Z Flip 4 looks like a more refined version of the current model. Meanwhile, we're hearing that Samsung's other big foldable, the Galaxy Z Fold 4, has some more substantial updates on the way including a change to the aspect ratio of the displays and some new cameras.

Looking at the previous Galaxy Z launches, we should see the Galaxy Z Flip 4 and the Galaxy Z Fold 4 arrive in August. Until then, we'll be on the lookout for more rumors and leaks to keep you in the loop.

Richard is a Tom's Guide staff writer based in London, covering news, reviews and how-tos for phones, gaming, audio and whatever else people need advice on. Following on from his MA in Magazine Journalism at the University of Sheffield, he's also written for WIRED U.K., The Register and Creative Bloq. When not at work, he's likely thinking about how to brew the perfect cup of specialty coffee.