GP high voltage battery 476A is your go-to for powering entry devices including garage door openers, wireless doorbells and locks, as well as remotes, dog collars, and medical devices. It is built to deliver long-lasting maximum power output that is stable throughout use, keeping up with today’s energy-demanding technology. Engineered to offer complete protection against leakage with secure sealing technology, protecting you and your devices. These batteries are developed to withstand the test of time and are guaranteed with a 3-year shelf life. Our alkaline button cell is mercury-free, reducing its impact on the environment.