Last updated: October 12th, 2026 at 13:56 UTC+02:00
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There are happy owners and disappointed ones, as there usually are when it comes to battery life.
Reading time: 3 minutes
Abhijeet Mishra / SamMobile
Samsung took its time giving its Galaxy Z Fold phones bigger batteries. The Fold 3 had a 4,400 mAh battery back in 2021, and the company stuck with that capacity all the way through the Fold 7 in 2025. That’s five generations without an increase, or six if you count the Galaxy Z Fold Special Edition (which got a limited launch).
The Galaxy Z Fold 8 Ultra finally brings a 5,000 mAh battery thanks to silicon-carbon technology, and some owners upgrading from older Folds have plenty of good things to say about it.
We've noticed the better battery life at SamMobile too, though the Fold 8 Ultra can struggle to last as long as the Galaxy S26 Ultra in our experience, despite both having a 5,000 mAh battery.
One Reddit user who upgraded from the Galaxy Z Fold 6 reported eight hours and 51 minutes of screen-on time since their last charge, with 22% battery remaining. They hadn’t charged overnight and were already usi...