Don’t throw that keyless entry remote away if it stops working; try replacing the battery with the MN27 Duracell Alkaline Battery instead. Duracell is the number one trusted brand that you can expect to work and that will last. The Coppertop alkaline batteries come with a 10-year guarantee in storage. This BPK 12V car battery will work for keyless entry systems for certain vehicles, including Lexus, Mercedes and Toyota. It’s a proprietary size made specifically for this application. Trust the number one product to keep the convenience of a keyless remote.