Thank you very much Renate for your prompt reply
It looks like there is a direct replacement, but I don't trust the quality of these
batteries, I think a new Asus Nexus battery is more reliable.
https://www.aliexpress.com/item/1005003044518936.html
Anyway from the replacement review I gather that the Onyx Boox Max 2 battery is similar to the Onyx Boox Note 2.
This thread describes in detail how to "transplant" the PCB board from the original Onyx Boox battery to the new Asus Nexus battery.
https://www.mobileread.com/forums/sh...=322308&page=2
https://www.mobileread.com/forums/sh...=322308&page=3
The whole process would not be done by myself, but by a local repair shop that has the right skills and experience in handling eink readers.
I appreciate a lot your comments and constructive criticism
in order to learn...