Radio was killing battery. Am I having electrical/wiring issues, or radio issues

What is your question?

The radio in my car died and would sporadically work until it just never turned back on. My battery died. Replaced the battery. Died again and charged it up, checked the battery and alternator, everything was fine. Died again and repeated the exact same thing. I unplugged the radio completely and battery has been fine since, is this an electrical issue or just with the radio?

What makes this problem better or worse?

Unplugging entire radio.

How long has your 2010 Nissan Sentra had this problem?

Started a year ago. Unplugged about 6 months ago and no battery trouble.