The network has data on the battery of the smartphone Samsung Galaxy Z Fold4. More precisely, about two, since the Fold line uses two batteries in each device.
So, the smaller element, B-BF936ABY, is characterized by a capacity of 2002 mAh, and the larger one, EB-BF937ABY, is 2268 mAh. Most likely, Samsung will indicate the total capacity of 4400 mAh in the specifications.
And the current Fold3 has exactly the same capacity, that is, the assumptions that this indicator will sag in the new model are not confirmed. However, this does not mean that the rumors that the Fold4 will be thinner and lighter predecessor, since this can be achieved in other ways. Moreover, we do not know how much thinner and lighter the novelty will be.