Giving your description some more thought -
What you describe is (hardware) write errors to the eMMC chip (hardware failures, internally).
Changing the screen should not have created a battery error - that was a certain sign that things where not "normal" with the device.
Somewhere here I have attached an archive containing both a script and a binary that does a: Write, Read-back, Verify type of copy - -
Which is what you need when trying to copy things (correctly) to a failing eMMC.
Sorry, I can't find the link to my post with that attached archive.
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