Battery drains too fast on iPhone remove photo with SN on it

Too fast battery percent loss

Hello, the phone was in use with the original battery until it reached 77% capacity at 1700+ cycles.

Due to the impossibility of contacting the official Apple center, I decided to contact the NOT OFFICIAL service.

At the moment, after replacing the battery, a year and 2 months have passed.

In the screenshot, the date is November 11, as you can see, the number of cycles has not even reached 300, and the battery condition is already 86%.

Let me remind you that the original lasted 1700+ cycles and 77% of the battery.

The most interesting thing is that I never use the phone to the maximum, my usual mode of working with it is to completely turn off all unnecessary functions and always use a dark theme.

When replacing the battery in the service, I was personally confirmed by its refusal from the original, there were zero differences, there was even an Apple logo on the inner loop of the skin. What led to such degradation of the battery?

[Image Edited by Moderator to Remove Personal Information]