First of all, can't drive my car out as there's a construction going on on my street. I start it like every other day or after 2-3 days.

2 months ago, I changed to UR pulleys, then been squeaking only during start-up. Then battery didn't hold any charge. I then replaced the battery.
Then just today, 2 months have passed, battery is completly shut no light in cabin.

Any idea what's the problem here? Could it be my alternator? the pulleys?

 

Either the belts are to big or they have loosened up

 

I'll try to tighten the belts

Bump for anyone else's input

 

a loose belt might not be charging the battery sufficiently if it's slipping on the pulley. i also had to re-adjust the tension two week after installing the UR ultra S pulley because of the squeak. i've had no problem with keeping the battery fully charged though.