Let the record show that the lifespan of a GP Powercell 9V battery in a Kidde i9050 smoke detector is just shy of 21 months. Thank you to the owners of this beach house for facilitating this inquiry. October 11, 2024 rossgradyinstagram, photography Post Views: 215 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading... Related Post Views: 215 Like this:Like Loading... Related Let the record show that the lifespan of a GP Powercell 9V battery in a Kidde i9050 smoke detector is just shy of 21 months. Thank you to the owners of this beach house for facilitating this inquiry.