Royal Enfield hunter 350 battery drain issue

It has been only about 2 years after I brought my bike. The main issue with this bike is that it doesn't start after not using for a week or so. Like first I thought it was because the battery was old so I changed and brought a new one. Still the bike has the same issue. I don't ride it very often and only use for short distance not for long rides.

Does anyone have the same issue ?