u/BusinessExtra107

I underestimated how fragile the panel was during disassembly.

I broke the screen while disassembling it, but it still displayed, with horizontal lines appearing on the front, and it still had power after so long. The PCB inside was surprisingly interesting:

* Ultra low-power design

* Wireless module

* Tiny battery management circuit

Honestly, it makes me want to sacrifice another one and document the whole reverse-engineering process properly.

Anyone here successfully opened one without killing the display?

I successfully disassembled a 2-inch chip and was able to inspect the internal PCB.

I will upload disassembly diagrams for other sizes later.

I bought a bunch of electronic shelf labels again.

I've always been curious about how these things can update wirelessly and still have a battery life of several years.

I plan to take one apart tonight to see.

If anyone is interested, I might document the whole disassembly process.

ESL Eink 7.5-inch electronic price tag teardown video