LightInk Watch Delivers 400-Day Battery Life With E Ink and Solar Charging

1 articles · Updated · TechRadar · May 19

A claimed 400-day battery life puts the LightInk watch far beyond typical smartwatches, with solar charging designed to keep the device topped up away from outlets.
E Ink is central to that endurance: the watch uses a monochrome, low-resolution display and strips back functions to basic timekeeping, with only occasional Wi-Fi and GPS connectivity.
Those trade-offs leave out hallmark smartwatch features, including health and fitness sensors, richer graphics and even a seconds display.
The project is also not a conventional retail product: it is open-source and requires a 3D printer, off-the-shelf parts, assembly, soldering and custom firmware work from GitHub resources.
That makes LightInk a niche device aimed at users who value extreme battery life over the broader feature sets offered by Apple, Google and other mainstream smartwatch makers.

By removing health tracking, does this watch prove the modern smartwatch has an identity crisis?

If users crave long battery life, why do major tech brands prioritize features that quickly drain it?