iPhone Duo battery capacity confirmed at 4,883mAh in Apple label

iPhone Duo battery capacity is now official, and Apple’s EU energy label puts the foldable at 4,883mAh split across two cells. That figure, along with 51.5 hours of rated endurance, gives Apple a clear battery story at a time when foldables are often judged on stamina first.

The label also reveals how Apple has packaged the power system inside the device. It is not a single large cell, but a dual-cell setup, and that detail matters for a foldable where internal space is always limited.

iPhone Duo dual-cell battery uses 2,962mAh and 1,921mAh packs

The label breaks the battery into two internal cells, with the larger 2,962mAh unit paired to a 1,921mAh cell. That split confirms Apple is using a dual-cell design rather than leaning on a single oversized pack, which is common enough in foldables where every millimetre counts.

Apple also marks the battery as non-user-replaceable. That is not unusual for a foldable, but it is still worth noting because repair access is already more complicated in this category. When hardware is packed tightly into a folding chassis, battery replacement usually becomes more of a service issue than a simple swap.

The 4,883mAh total gives the iPhone Duo a concrete number buyers can compare against other foldables. Battery capacity alone does not tell the whole story, but it is often the first figure people look for when deciding whether a foldable can last a full day without being pushed hard.

iPhone Duo 1000 charge cycles and IP68 protection add durability claims

Apple rates the battery for more than 1,000 full charge cycles before noticeable deterioration. That is a useful longevity marker, especially for a premium device that is likely to be used heavily over time. It does not mean the battery will perform the same forever, of course, but it gives a clearer view of expected wear.

The label also lists IP68 protection, which adds another layer to Apple’s durability pitch. In a foldable, ingress resistance is especially important because the design has more moving parts and more potential weak spots than a standard smartphone. IP68 does not remove those risks, but it does strengthen the device’s overall resilience on paper.

Apple’s numbers put the iPhone Duo in a strong position for battery-related comparisons, even if the repairability trade-off remains visible. Buyers looking at premium foldables often compare endurance, durability, and serviceability side by side, and this label gives Apple a solid case in the first two areas.

That is also where the Galaxy Z Fold 8 battery capacity story enters the picture. The iPhone Duo now has official figures attached to its name, and that makes it easier for Apple to frame the conversation around battery life instead of leaving it to speculation. For a category that is still trying to prove itself on endurance, that matters.