Draining Battery Issue
 

Whats up everybody, i have a 2001 Jetta 1.8T.... im having an issue with all my batteries dying on me. basically i put in a brand new battery, a week went by without driving it, and it was dead completely, i replaced it and 3 days without driving it, it was completely dead. so i tried doing some testing and all results were inconclusive about a problem. after my last replacement, the car stayed alive and has for about 8 months now, upon further investigation, the difference from now to when it was constantly dying, is there is no fuse for the radio anymore. when there is a fues in the radio slot, i cant keep the car alive. so i was wondering if there are any problems someone could point me towards that could make the radio be draining these batteries so quickly? its the stock radio

thanks in advance