iPhone Duo Battery Capacity Officially Revealed: 4,883mAh and a 51.5-Hour Rating
The last unknown specification of Apple’s first foldable is now official. Ahead of the iPhone Duo’s release this Friday, 23 October, Apple has published its EU energy label for the device (model A3720) — and the label confirms the battery capacity Apple declined to state at the announcement: 4,883mAh, split across two cells inside the folding body.
The official numbers
- Total capacity: 4,883mAh — two cells of 2,962mAh and 1,921mAh, one in each half of the phone
- Rated endurance: 51 hours 30 minutes per charge cycle on the EU test
- Battery durability: Rated to retain performance for at least 1,000 charge cycles
- Efficiency: Class A on the EU label
- Video playback (Apple’s figures): Up to 44 hours on the outer display, 31 hours on the inner display
Because the Duo is eSIM-only worldwide, there is no SIM-tray variant with a different battery — the 4,883mAh figure applies in every market, Pakistan’s importer units included.
How it compares
The Duo lands between Apple’s own flagships: above the iPhone 18 Pro (4,288mAh) and below the 18 Pro Max (5,567mAh). Against rival foldables it edges Samsung’s Galaxy Z Fold 8 (4,800mAh) and trails Huawei’s Pura X Max (5,300mAh). Capacity is not endurance, of course — the Duo drives two displays, and Apple rates typical mixed use at around 24 hours. The 2nm A20 Pro chip and iOS 27’s power management across both panels will decide the real-world result once reviewers test it.
The fine print
The same label gives the Duo a repairability score of 2.65 out of 5 (class C), and battery replacement pricing reported from Apple’s service tables sits at $229 — foldable ownership costs remain foldable-sized. Supply is tight enough that Apple has limited US orders to two per customer, according to MacRumors, which matches the constrained pre-order picture we covered when orders opened.
Pakistan plans, unchanged
The Duo releases globally on Friday 23 October; Pakistan availability follows through importers, with local stock expected in November and no official Pakistan price yet. Our iPhone Duo pre-order coverage has the full timeline and the US pricing for reference.
Final Verdict
A 4,883mAh battery with a 51.5-hour EU rating is a credible first effort for a 5.2mm-thin foldable — not the compromise many expected. The Duo’s spec sheet is now complete; what remains is the only test that matters, which starts when the first units reach buyers on Friday.
