Battery replaced but drains

Hello. Having recurring problem car was not starting, just clicking (started two years ago, December and bitter cold). Replaced battery with upgraded battery. When weather got warm into spring summer fall no problem. Last winter same problem. Had replacement battery put in under warranty. No more problems. Now it is December again and cold. But not bitter. Same problem three times in last few weeks. Paid service station $50.00 to check it and recharge it to 100%. Then same thing again; clicking but wouldn't start. Had it jumped again by road service two or three days ago. Today same problem. Only takes a couple days for this to happen. Making sure courtesy lights off, radio off, heating system off, device charging cords unplugged.