Kidde 10334 - 9 volt Battery (2 pack) (Kidde 9V alarm replacement batteries, 2pk. Bl (9V Battery))
$12.99
Kidde 9 volt - Best for Smoke Alarms or Carbon Monoxide Alarms | Kidde Battery (2 pack) (Kidde 9V alarm replacement batteries, 2pk. Bl (9V Battery) 10334)