A: All current Kidde and Kidde/FireX alarms are compatible with each other as FireX is now a sub-brand of Kidde. FireX alarms from before 2008 may or may not be compatible with current Kidde products but smoke alarms only have a 10 year lifespan and alarms from before 2008 should be replaced anyways due to age.
A: Hello. It has options for multiple distances for all the standard electrical boxes used by your old alarm so that should not be an issue. There is no direct replacement for your alarms. That being said, you can use any of our current alarms to replace your older alarms. You will have to take down all of the older alarms before putting up any new alarms. You will have to change out the mounting brackets at each location but that will just take a screwdriver to change out. You will either have to change out and rewire the wiring harness plugs at each location or you can choose to use the KA-F2 adaptors to adapt the old plugs to our new alarms. The adaptors would plug into the old plugs and the new alarms would plug into the adaptors. The model for the adaptor pack is the 21028461 which includes the KA-F2 and the KA-B2 for some of the older BRK/First Alert plugs.
A: Hello. The battery tamper feature might have been activated on the back of the alarm, which would keep the battery door from opening. See the back of the alarm and the owner's manual. If that is not the issue, take a picture of what you are talking about and have it ready to email to us when you call us at 1-800-880-6788 so we can help you further.
A: They do come with batteries, however, depending on how long they've been on the shelf, the batteries might be old.
A: Hello from Kidde, The 9-volt backup battery is included with each alarm.
|Top Rated||Top Rated||Top Rated||Top Rated|
|Name||Firex Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alarm and Front Load Battery Door (2-Pack)||Nest Protect - Smoke Alarm and Carbon Monoxide Detector - Wired||10-Year Worry Free Smoke & Carbon Monoxide Detector, Lithium Battery Powered with Voice Alarm, 2-Pack||Nest Protect - Smoke Alarm and Carbon Monoxide Detector - Wired - 2 Pack|
|Alarm/Detector Features||Battery Back-Up,Hush Feature,Interconnected,Tamper Resistant,Value Pack,Voice Alert||Hush Feature||10-Year Battery,Hush Feature,Tamper Resistant,Value Pack,Voice Alert||Hush Feature|
|Alarm Sensor Type||Photoelectric||Dual-Sensor||Photoelectric||Dual-Sensor|
|Smart Home||Smart Home Enabled||Smart Home Enabled|
|View Product||View Product||View Product||View Product|