Costco had switched from Kirkland signature brand batteries to Interstate car batteries.
While we found no official online information on the said brand of car batteries, anecdotal reports say that an Interstate battery costs $77.10 on average, plus an additional $15.00 core fee which can be refunded upon the return of your old battery.
For reference, you can also view Vaughns-1-pagers.com's summary of the Interstate auto and marine 12-volt batteries sold by Costco.
For product and more detailed pricing information, you may contact Costco Costumer Service at 1-800-774-2678, or visit your nearest Costco using their Warehouse Location tool.
Find more useful contacts here.
Interstate Batteries is one of America's No. 1 replacement-brand batteries.
Alternatively, you can also try some of the best car batteries for your vehicle, according to CarsDirect:
The average car battery lasts somewhere between two and five years, but there are ways to extend its lifespan. Check out some tips to help you get the most out of your car battery at Foxnews.com.
Here's more: Check out some things to consider when buying a battery at ConsumerReport.org.