The S25 Edge has a battery capacity of 3,900 mAh, a paltry amount for 2025. At first, and according to previous reports, the S26 Edge was said to barely make an improvement. As such, many still held the belief that this new model was pointless, a fact backed up by poor Galaxy S25 Edge sales.
Samsung has apparently (translated source) found a way to equip the S26 Edge with a battery that is 4,400 mAh, the same as the Galaxy Z Fold 7. How the company managed this, given that there are no reports of it switching to silicon batteries, is a mystery. The leak could be wrong, of course, but this is generally a very reliable source.
Samsung’s top-end flagship models — the Ultra line — have remained at 5,000 mAh batteries for many years now, and the Galaxy S26 Ultra is going to continue that trend. Keeping that in mind, 4,400 mAh sounds like a pretty sweet deal to me, provided that Samsung can maintain the slim form factor.
Our Galaxy S25 Edge battery test found that it wasn’t too bad, so the S26 Edge will almost match the S26 Ultra, if I had to guess.
The S25 Edge runs way longer than I initially thought it would. | Image credit — PhoneArena
If the Galaxy S26 Edge really does come with a battery capacity of 4,400 mAh, then the Edge models will become a pretty decent replacement for the Plus phones. At least, if nothing else, we’ll know that Edge users aren’t getting the worst battery life a modern smartphone could offer.
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