Hi!
Since I was worried about battery calibration and couldn't find a guide of how to do it, I will tell you how you can do it and what happens when it's done below-
NOTE:- Never unplug your charger after you starting calibration until the whole process is completed even while discharging. (Seems counter intuitive but the acer care center discharges the battery when the charger is plugged in during calibration only. )
1. Connect your charger, start battery calibration and charge your laptop to 100%.
2. After getting to a 100% the battery will start discharging on it's own while the charger is connected. Sometimes it might take a while for the battery to start discharging even though the indicator on the screen is showing 100% because the battery is not calibrated and is not actually fully charged so you have to wait.
3. The laptop will discharge to around 3% and then start to charge again.
4. After it charges fully again, you will get a message on the care centre saying that the battery calibration was "Last checked: DD/MM/YYYY". Which tells you that your battery was calibrated.
Conclusion: I hope this helps you. I have completed the calibration just a few minutes before typing this comment so I cannot tell you if it's worth the hassle as of now. It is obviously not showing the absolute correct remaining time after calibrating but I just did it for my peace of mind and to get this done with.
P.S.- I have a Predator Helios Neo 16 and during step 2, the on-screen display of the laptop showed that the charger was connected. However, the light which indicates that the laptop's charger is connected turned off which confirmed that the laptop had started to run on battery power even though the charger was connected. The steps may be straightforward for many, but I was looking for something like this before calibrating the battery but since I could not see it, I have posted it myself. Hope this helps!
[Edited the thread to add model number to the title]
