Ok so first of all let me say that this is not normal. It must be faulty alternator or some other magical thing that Honda is not yet able to diagnose. My friends and my bro has this model and all have the same problem. Another one changed the battery and replaced with dry cell and still his car gave issues in starting as battery had no power. Removing the padding does help to a certain extent but still the issue is there. My bro went to Honda and they emptied 2 water bottles in battery and in the end they asked for price of those 2 bottles which he simply refused to pay. Now he was asking to see how he can take Honda to consumer court due to this and other issues with new car.
Other than overcharging it could be that some thing in car is draining battery even when the car is off.
I have a 8th Gen Civic and believe me I check battery water after 4 or 5 months at minimum and even then it only needs very little water to be added up. And this is same with the Mehran I have kept.