I just replaced the battery for my rMBP 2015 13’, but after the replacement I found out that my laptop works somehow slower than before, even with power adapter. Under BigSur I was able to playback 4K videos on YouTube (with charger) but after the replacement I lost the 4K option. I had to reopen it via Safari-Developer Settings-VP9 On Battery and it gets lags when playing 60fps 1440P. And also my Iris Graphics won’t run more than 850MHz, before it could easily get around 1 GHz, CPU run slower and consumes less power also. My rMBP now functions like if is always on battery, although it’s connected to charger. Under System-Info and CoconetBattery everything seems fine. Anybody has the same issue?