I also purchased a Duralast battery. After about two years (within the warranty period) I began to notice it was slow to turn my engine over.
A few days later, I went out after driving my vehicle 30+ minutes and the battery was completely dead. I jumped it and shut off 30 minutes later and battery was still dead. I went to my local Autozone and the STORE MANAGER refused to come out and check the battery because "it was raining". I was told I could remove my own battery and bring it inside of I wanted it checked (no tools or assistance offered).
After a few minutes of trying to remove my own battery at night in the rain, I was fed up. I went in and told them I would purchase this and every car part in the future somewhere else. No response from the employees inside. Upon attempting to call the "district manager" phone number on the door it connected me to the same store manager who refused to help me.
He put me on hold "looking for their corporate number".
I hung up and googled/ called their corporate office and left a voice mail (no response as of yet). I went to O'Reilly's where the associates were glad to help me I the rain including helping me purchase and install a new battery.
Product or Service Mentioned: Duralast Battery.
Reason of review: Bad quality.