Forget the Apple Watch Ultra 3, This E Ink Smartwatch Offers 400 Days of Juice to Obliterate Its Battery Rivals

Forget the Apple Watch Ultra 3, this E Ink smartwatch offers 400 days of juice to obliterate its battery rivals

The LightInk smartwatch has 400 days of battery life, but some serious compromises too

LightInk solar E Ink watch claims around 400 days of battery life

LightInk is an open-source DIY solar E Ink watch that pushes battery life to an extreme. It is built around an ESP32, a small solar cell and custom low-power hardware, with the aim of making a basic watch that can run for months, or potentially keep itself topped up from light. The device feels like a throwback to the original Pebble era, when smartwatch design was still more about practicality than loading a wrist with apps and sensors. The foc…