WinCo Foods, primarily known for its grocery offerings, does carry a range of general household items, including batteries. While they tend to have standard battery types such as AA, AAA, C, and D, the availability of 9-volt batteries can vary by location. Many WinCo stores do stock 9-volt batteries, especially in areas where electronic devices requiring these batteries are commonly used.
If you're planning to visit a WinCo Foods store, it's a good idea to call ahead or check their website for the specific store's inventory. Alternatively, larger grocery stores or retail chains often have batteries in stock, so you might consider those options as well if you can't find them at WinCo.