Petaling....how do you get costco to exchange your battery every year? When you tell them the battery is bad....they don't check it? I want to know because I like the idea

I have had this battery killing drain in two instances. The first time...it was the radio. No idea why the radio would drain so much...must have been an internal short, though the radio was a decent quality item, and worked just fine.
The other...now this will sound stupid...but once in a while, I would pull the car in the garage....and I would leave the key in the ignition. I know...stupid....but that creates a battery drain having the key inserted in the ignition. Also, the battery was getting a bit old at the time, so it was probably a combination of the key in ignition, and old battery.

I like that priority battery thing...I will keep in mind "just in case"