(Image credit: Tom's Guide)

The best foldable phones come with some compromises, and the iPhone Duo is no exception to that. You only have two main cameras, the screen is shorter than you'd find on other iPhones and the battery is noticeably smaller than the one in the iPhone 18 Pro Max — just to name a few.

But when it comes to battery, size only matters so much. There are a bunch of different factors that impact how long a device can last on a single charge, which is why testing is so important.

I Tested iPhone Duo.... What's The Catch? - YouTube

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We have done our testing with the iPhone Duo, using a custom battery life test designed to mimic ordinary daily use.…