Very bad Chinese imitation

As a product, it is as described. I didn't have much difficulty in placing it on my s7 edge. But the problem ultimately lies with my phone, most likely due to the motherboard and not the battery, as it continues to shut off on its own. However, as a replacement battery, it is reliable.

I changed it expecting it to be better than the original and last longer. From the day I put it on... it is simply worse than the old one!! It lasts half a day with moderate use! Update 09/12/2020: I put the old one back on and I relaxed!!!!!

The battery unfortunately has only 65% of its actual capacity. It may not be authentic or it has been in stock for a long time. Search extensively for purchasing an authentic one.

I would like to help.
I had a problem with my S7.
It charged quickly and steadily without using it, but it was very slow while charging. Many times it took 4.30 hours from 0 to 100%.
From my experience with the phones I have changed, it didn't seem to be the battery's fault.
I did a factory reset and everything magically fixed!
Before replacing the battery, read about it on the internet. There are articles that explain exactly what to do if you have a problem.
I hope I helped

I bought a battery from the company .... As soon as I put it in, it didn't charge and didn't work, so I went and they replaced it for me. The second one they gave me lasted two months and then it swelled up and the problems started again. I have paid a mechanic twice for replacement and I still have to do the same thing.

Discharging very quickly without even using the phone, as soon as it reaches 40% it discharges and reaches 5%... I would like my money back