this post was submitted on 14 Jul 2026
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URL for the crowdfunding: https://www.crowdsupply.com/oddly-specific-objects/open-book-touch

Specs:

  • Display: 4.26" e-paper touchscreen, 480 × 800 px, warm + cool frontlight
  • Processor: ESP32-S3 dual-core, Wi-Fi + Bluetooth LE
  • Memory: 16 MB flash, 8 MB PSRAM
  • Formats: EPUB and plain text, no DRM
  • Storage: microSD card slot
  • Interface: USB-C with integrated LiPo charging
  • Dimension: 78 × 120 × 10 mm, about 85 g
  • Open source: MIT-licensed firmware, open hardware (to be released at shipping)

It also has a replaceable 800 mAh battery, I found it cool :)

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[–] PragmaticOne@lemmy.world 6 points 5 days ago (2 children)

The replaceable battery is definitely a requirement for me moving forwards on all new tech I purchase.

[–] gary_host_laptop@lemmy.ml 8 points 5 days ago (1 children)

while it's nice, i'd argue e-readers use so little battery that even the default should last for at least a decade, but having it is awesome for sure.

[–] FishFace@piefed.social 3 points 5 days ago

Mine is over 10 years old and the battery still lasts weeks. I don't notice any degradation but... probably wouldn't.

[–] skarn@discuss.tchncs.de 2 points 4 days ago

Meh. I would say that if anything deserves an exception, it's ereaders.

Im my wife's kindle PW I can replace the battery, and have done that.

But there are simply no new batteries for that kind of device to be found. So then the new battery lasts 20% longer than the old one, and maybe added a year to the device's life.

Replaceable battery isn't worth much if you don't have a reason to believe you'll be able to source a good one a decade from now.