Chosen Solution
I had a message on the macbook that my battery needed to be replaced, so I got all the parts. Took the Macbook pro apart and installed the new battery. Now it seems that it is not working and I don’t know what caused or causes the problem for it not to charge. I have followed all steps and worked very carefully. I will attach all the pictures I took during and after the instal in the hopes that someone notices whats wrong and can help me :)
It looks like in your 2nd to last picture, the little latch holding the battery data cable in is missing. This could be this issue. This cable carries all the sensor and charge data from the battery to the board. So if the cable isn’t making good electrical contact here, any of the checks the battery makes to know if the system is present, or the system makes regarding how much battery life remains are not getting transmitted. Usually this latch isn’t vital? Though definitely recommended. A loose connection here could certainly be the cause.
