Apple never reveals iPhone battery capacity. Most analysts are left guessing and that has remained the trend for years. And going by the latest leak, the iPhone Duo might not be the exception everyone was hoping for. So, what is iPhone Duo battery capacity? Well, first of all, iPhone Duo is an eSIM phone. Meaning iPhone Duo does not have a SIM tray. And that immediatelly reveals the fact that Apple has freed up space. And notably, it used that to boost battery capacity. Having said that, an EU energy label has revealed that iPhone Duo battery capacity goes as high as 4883mAh. The battery is split across two cells, one at 2,962mAh and the other at 1,921mAh.
iPhone Duo battery capacity is not groundbreaking, but not nothing either, especially once you line it up against the folding competition. Numbers alone don't mean much without context, so here we compare the iPhone Duo battery capacity with other foldables from Samsung, Google, Oppo and others:
The iPhone Duo battery capacity of 4,883mAh is not just a rumour anymore; it lines up neatly with the dual-cell leaks that came before it. And there is a reasonable explanation behind the number too. The iPhone Duo skips a physical SIM tray entirely, going eSIM-only, which frees up internal space that Apple seems to have used to squeeze in a slightly bigger battery than it otherwise might have managed. However, with all US models in recent years being eSIM only, it does mean that Apple simply rolled out the US version it had prepared globally.
The battery capacity is large, but then the display itself is huge and there are 2 of them - the inner one and outer screen. With the latter being really energy hungry.
Numbers alone don't mean much without context, so here we compare the iPhone Duo battery capacity with other foldables from Samsung, Google, Oppo and others:
iPhone Duo: 4883mAh
Samsung Galaxy Z Fold 8: 4800mAh
Samsung Galaxy Z Fold 8 Ultra: 5000mAh
Google Pixel 11 Pro Fold: 4806mAh
Oppo Find N6: 6000mAh
Moto Razr Fold: 6,000mAh
Honor Magic V6: 6,660mAh
Going by this list, the Duo sits closest to the Galaxy Z Fold 8, a phone that typically manages somewhere between five and eight hours of screen time, depending on whether you are using the inner display more than the outer one. Whether the Duo beats that in the real world will be known through actual daily use, not spec sheets.
One more thing. iPhone Duo battery is made of lithium-ion cells while Chinese brands have moved to silicon-carbon batteries to squeeze out more capacity without adding bulk. Apple looks to be playing it safe as it cannot afford to roll out phones that heat up or worse, catch fire. Chinese phone makers don't seem to have those worries. That does leave Apple at a disadvantage versus competition, at least as far as iPhone Duo battery capacity is concerned.