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Yes for charging: the iPhone Duo takes MagSafe and Qi2 chargers at up to 25W. Fit is the catch. Upright stands can tip when the Duo is open, and none of the chargers and power banks this site picks lists the Duo, nor does Apple's own MagSafe wallet. What works folded, what works open, and which accessories name the Duo.
The iPhone Duo costs $700 more than the iPhone 18 Pro Max at every storage size: $1,999 against $1,299 with 256GB. The extra money buys a 7.6-inch screen that folds to about the size of a passport, with Apple Pencil support due later this year. It gives up the telephoto camera, Face ID and about four hours on Tom's Guide's battery test. Specs, same-lab battery tests, cameras, repair costs and who should buy which.
Out of warranty, Apple charges $999 to fix the iPhone Duo's folding inner screen and $379 for the outer one. AppleCare+ with Theft and Loss costs $199.99 a year and cuts those fees to $99 and $29, so one inner-screen repair is worth four and a half years of the plan. Every repair price, the break-even, AppleCare One, and how Verizon, AT&T and T-Mobile compare.
Apple announced the iPhone Duo on September 9: a foldable with a 5.4-inch outer screen and a 7.6-inch inner one, the A20 Pro chip and a $1,999 starting price. Pre-orders opened October 16 and phones arrive October 23, five weeks after the iPhone 18 Pro.