Saved $40 on a new car battery today.

First post here but hope this qualifies. I have been trying to stretch the life of my car battery for as long as I could (4 years ain't too bad) when it just had enough this morning. I managed to get one more crank and then drove over to Advanced Auto Parts.

I changed my brake pads a few months ago and I remembered that I purchased them online and got a discount just from ordering online to pick up in-store. So I thought I'd do a quick check just in case. They were offereing a discount of 25% this time. When I arrived at the store I sat in the parking lot, ordered and payed for the battery on their store website on my smartphone, walked in, and saved $40 plus free install and the refund for my old battery (about $23).