OP... the charging port itself is probably bad. No one is unlucky enough that multiple brand new batteries etc. happen to all be bad.
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That’s what I was starting to think as well, thank you
Try and check your charging brick and cable, is there something wrong about it? Verify your charge port too by seeing how much power is it taking, I have the first S tablet, and before reparing it, that stupid Micro-USB was not working sometimes ...
Just to make sure the parts you used for this repair are OEM, could you please provide the link to the Amazon product you bought ?
Thx
In the end I gave up with my attempt to self repair the tablet and returned the battery to Amazon. I’ll probably bring it to a Samsung store and ask them what’s wrong with it. But thank you for your reply!