Galaxy S27 Ultra Gets a Bigger Battery. Is the Fold 9 Next?

Quick summary: The latest rumor says the Galaxy S27 Ultra goes from 5,000mAh (S26 Ultra) to 5,700mAh, and the smaller S27 Pro gets 5,200mAh, which is still more than the S26 Ultra. I think this points to bigger batteries across Samsung’s premium lineup, including the foldables.

What 5,700mAh could mean

The S26 Ultra already gets great battery life. If you’re getting through roughly 9 AM to 6 PM now, a bigger battery plus a more efficient, more powerful chip could stretch that to about 9 to 9.

My predictions for the foldables

Samsung already put slightly bigger batteries in this year’s foldables, and I think it’ll happen again.

• Galaxy Z TriFold 2 (I expect August 2027): last year’s TriFold had 5,600mAh. I think the TriFold 2 could be Samsung’s first 6,000mAh phone, maybe even around 6,400mAh.
• Galaxy Z Fold 9 Ultra: probably about 5,700mAh, matching the S27 Ultra.
• Galaxy Z Fold 9: probably about 5,200mAh, matching the S27 Pro, maybe up to 5,400mAh.

Why batteries make sense

If RAM and storage upgrades get more expensive, a bigger battery is a visible hardware upgrade that won’t cost consumers too much, especially with silicon-carbon batteries, which pack more capacity without getting physically bigger. And yes, I know the Motorola foldable has 6,500mAh, and some Chinese phones have 10,000mAh. I don’t expect Samsung to go that far.

Verdict

I’m already happy with this year’s foldable battery life, but it can always improve. I expect battery to be one of next year’s big upgrades again, and the S27 Ultra looks great with that big battery, by Samsung standards.

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