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Since the first model, the diagnostic port of the Apple Watch has been a mysterious part of the wearable product line, but the new series 7 officially abandoned the six-pin port completely.
MacRumors first pointed out that when you remove the bottom strap from the Apple Watch Series 7, you can see the missing ports-the company has removed the hidden panel and the ports on the back. This port is exclusively used for internal diagnostics, but has not been officially recognized on Apple’s website or documentation. But the diagnostic port briefly hints at the possibility of extending Apple Watch with hardware accessories.
The most famous of these is the Reserve Strap, which attempts to extend the battery life of the Apple Watch by integrating an additional battery into a special strap that will be directly inserted into the diagnostic port. This port actually also provides a faster charging speed than Apple’s own magnetic cable.
Unfortunately, Apple quickly blocked this feature and Reserve Strap (and almost all other attempts to use the port for useful purposes). In the subsequent life cycle of the Apple Watch, it is still used for its intended purpose: to diagnose Apple’s internal use and repair.
Of course, Apple still needs a way to diagnose on the Apple Watch, and seems to be replacing the mysterious port with a more mysterious 60.5GHz wireless module that is paired with a magnetic base capable of local data transmission for internal use. This has led some people to speculate that Apple is using Series 7 as a test platform for the future portless iPhone, which can use similar technology to replace the cable connected to the computer. However, if years of useless diagnostic ports have taught us anything, it is that sometimes no greater meaning or utility is found in proprietary diagnostic tools.