[ad_1] TL;DR An open-source project called LightInk could put an ultra-efficient E-Ink display on your wrist. The watch reportedly uses just ~0.5mAh per day, translating to roughly 40 days of battery life in typical use. It is also solar powered, and aggressively optimized for “infinite” runtime under the right conditions. E-Ink already makes a lot …
This open-source e-ink smartwatch project trades features for battery life
