New certifications reveal that Apple's upcoming foldable iPhone, speculatively named the 'iPhone Ultra,' will house a substantial battery. Two certified battery units totaling 4,883 mAh (rated capacity) suggest a typical advertised capacity of around 5,000 mAh. This places the iPhone Ultra's battery endurance in direct competition with rumored figures for Samsung's next foldable, the Galaxy Z Fold 8 Ultra, which is also expected to feature a battery close to 5,000 mAh.

The dual-battery configuration is a common design choice for foldable phones, accommodating the split display. The sourcing of these batteries from one of Apple's regular suppliers indicates the device is nearing production.

This battery capacity is significant for a foldable device, addressing potential concerns about endurance in a form factor that often requires compromises. The iPhone Ultra is anticipated to launch in September alongside the iPhone 18 Pro and iPhone 18 Pro Max, with current reports indicating no delays.