4.2-inch e-ink screen enclosure using 18650 batteries

Suiyuanzhai 4.2-inch E-Ink Calendar Adapter Case + Parts List Solution

E-paper Screen Calendar - Suiyuanzhai Calendar - 18650 Version

4.2-inch e-ink screen with a 5-cent charging module

7.5-inch E-ink Screen Clock Calendar (two versions, Version Two adds a stand with enhanced length and magnetic function)

7.5-inch three-color high-resolution e-ink screen calendar photo album (flashing firmware included)

4.2-inch e-ink screen with stand and magnetic mount