Apple’s largest Pro iPhone gets its biggest battery upgrade yet to make it a true two-day phone with new Siri AI and a variable aperture camera.

The iPhone 18 Pro Max is the supersized sibling of the regular 18 Pro and, though it is no longer Apple’s most expensive phone thanks to the £2,000 iPhone Duo , it has a similarly large price tag to match costing from £1,299 (€1,599/$1,299/A$2,299).

The 18 Pro Max follows the familiar formula of its Pro Max predecessors : take everything that’s great about the 18 Pro and supersize the screen and the battery. That means it has a first-class camera, the fastest performance and very long software support.

A Popsocket on the back , or an official lanyard or wrist strap attached to a case, is almost a necessity for the 18 Pro Max. Photograph: Samuel Gibbs/The Guardian

But it also means the 18 Pro Max is hard to use with one hand and pretty big to fit in a pocket.…