Auto parts stores such as AutoZone sell batteries for car remotes. The store has different sizes and types of batteries for remotes.
In order to obtain the right battery, the customer must know the type of vehicle or remote that they are needing it for. Many auto part stores also sell universal batteries. Most of the batteries can be purchased online, or at one of the auto part store locations. AutoZone also sells car remotes and other car parts. There are locations all around the United States. Wal-Mart is another store that sells batteries for car remote and the selection varies by location.