Can someone help with ipad mini charging issue... Thanks!

I have seen others with similar questions on here but did not discover a satisfactory answer.

I replaced my digitiser screen, all is fine with that but in the process I've popped off one of the resistors on the battery connector.

The problem is that the ipad does not charge anymore, which is really annoying (obviously).

However, I roughly positioned the resistor in place the other day and left the tablet on overnight. miraculously it was at 100% power the next day, although when used this never diminished. Got about 4 hours use from it on skype at full brightness (about normal) then it died again. Now it's back at 2% and not charging (left overnight, no dice)

Would this have worked because the resistor was roughly in place or is there some other reason ?

I've heard people saying that the resistor doesn't matter and it just tells the device how much charge it has but in my case it seems to be causing problems for sure.

Today I've just dropped it back into place (roughly) and again the tablet is refusing to charge beyond 2% and is in the boot/reset loop :-(

If I've "bungled" things and this is not solveable as a home repair can anyone recommend someone in Europe who can do this repair ? I live in Spain and people here do not seem able to do this, they can just "repair" (ie replace) the plug and play parts rather than doing micro soldering etc.

Any and all help much appreciated. I won this tablet in a competition and use it to speak with my girlfriend when she is away with work as the camera on my laptop is goosed so it's really been a pain not having it.

Also it doesn't work when plugged in, either, it just behaves in the same way with regards to powering off intermittently, even on lowest brightness with wifi off.

I wish it would be possible to make it work okay without microsoldering this part back on, it's a real nightmare and very expensive (it seems) for me to do this :-(