Phone shutsdown with new battery

Hi, I recently changed the display and battery of a Samsung J7 Prime (SM-G610M), and I'm having problems with the battery, the phone dies at around 40% battery, and it dies it doesn't begin the shut down procedure. I tried recalibrating the battery with full charge, full drain, try to turn on, and full charge. This cycle 3 times, and it still does the same.

While I could go to the old battery I'm afraid to do so, as this phone model you need to take out the display to get to the battery, and I'm afraid of breaking it.

I even tried an app for battery calibration (thou the cel is not rooted), and it marked 4.2v at full charge.