Why does my "01 Hyundai Elantra battery continue to die?

What is your question?

I am orginal owner of "01 Elantra with little over 46,000 miles. I have purchased 3 batteries in just over year and half. The battery continues to die. I have to have the car jumped on average 3 times a week. I have concluded it may not be battery but possible electrical. It in particular is bad about this in cold weather. The dome light no longer works, the clock does not work, and I have experienced minor electrical issues with the windows. Does anyone else have this problem and do you know what can be done. Admittedly, I am not car savy and not good with car language.