My iphone gets off at 23-30% of battery

Well, most likely you installed an inferior quality battery; apparently you didn’t have Apple install it, and from your screen shot, it wasn’t even an Apple-spec battery.

There is one thing to try, since it isn’t an Apple battery with a built in state of charge monitor; try to recalibrate the battery gauge. To do that:

• Charge the phone to 100%
• Use the phone until it drops to 0% and shuts down
• Charge the phone to 100% while not using it.

This is how you could calibrate the battery gauge on older phones that didn’t have “smart” batteries.

It needs a new battery→iPhone Battery Replacement - Official Apple Support