The Samsung Galaxy Fold line has had the exact same 4,400 mAh battery capacity since the Galaxy Z Fold3, which came out in 2021 – and, funnily enough, the Fold2 from 2020 actually had a bigger 4,500 mAh battery.
This situation is ridiculous when you look at what Chinese foldables can offer in terms of battery capacity these days, and apparently Samsung is finally going to do something about it. A new rumor claims the Galaxy Z Fold8 launching later this year will finally up this battery capacity – but not by much.

Samsung Galaxy Z Fold7
It will, however, go all the way up to 5,000 mAh, matching the Galaxy S26 Ultra‘s capacity, which in itself is not impressive at all in 2026, but it’s where Samsung has been stuck for a while. So while the Fold8 still won’t be matching its Chinese competitors in battery size, it will at least have an almost 14% improvement in capacity compared to every previous fold since the Fold3.
Today’s rumor claims the Fold8’s two batteries (there’s one on each side) will have a rated capacity of 2,369 mAh and 2,485 mAh, respectively, adding up to a total of 4,854 mAh. This rated capacity will be advertised as a 5,000 mAh typical capacity.
The ‘wide Fold‘ which is also rumored to launch this year to placate Apple’s iPhone Fold with a similar form factor will have a 4,900 mAh battery instead. Both it and the Fold8 are likely to become official around July.
Source (in Dutch)