Replacement Battery Charge Level

I have just replaced the battery in my Nexus 6P last night and this morning reached the point were I needed to give it it's first full charge as indicated from the card that was inside the battery packaging (Let it drop to 10% and then full charge to calibrate new battery). I let it get down to about 6% before plugging it in and left it alone on my desk while I worked. Once the power level reached 89%, the battery indicated that it was fully charged. I continued to leave it plugged in for about 20 minutes, it still never went about 89% and still said "Fully Charged". I'm also using the app AccuBattery (paid version) and have for some time to get battery diagnostics and whatnot. I'm hoping that with my next charge it would be correct but perhaps there is something else I can do?

Any input would be greatly appreciated!