Buying lower-priced batteries at a dollar store is most of the time getting old ones that do not reach Target’s standards anymore. Dollar store items are often liquidated from other retailers.
“Batteries may have been on a Target shelf for three years, and now they don’t hit Target’s standards anymore. Dollar stores are not ordering new batteries and pricing them well—they’re taking old stuff off other stores’ shelves,” says Shelton
So, even if the price is indeed smaller, your batteries will be old and poorly made. You’ll see them draining quickly or even worse, leaking. Many low-priced batteries contain carbon-zinc, making them prone more to leaking, compared to higher-quality ones that contain lithium.
With all this being said, choose a brand name that you know you can trust and you’ll get a better working product.