The Kidde 20SDR is part of the DETECT line and uses enhanced photoelectric sensing to reduce false alarms often triggered by cooking. Powered by 2 AA batteries, it provides continuous protection even during power outages. Self-testing internal components ensure the alarm is always operating as expected. Three long beeps with a red light flash indicate smoke detection. A twist-and-click mounting bracket simplifies installation. Battery should be changed every 6 months or when the low battery chirp sounds.
How often do I need to change the batteries in the 20SDR?
Kidde recommends changing the 2 AA batteries in the 20SDR every 6 months, or when the low battery warning chirp sounds. Using fresh, quality alkaline batteries ensures reliable operation.
What makes the 20SDR a DETECT-line alarm?
The DETECT line features enhanced sensing technology that reduces false alarms often caused by cooking. The 20SDR photoelectric sensor detects smoke particles from a broad range of fire types while minimizing nuisance triggers from everyday kitchen activity.
Does the 20SDR have a self-test feature?
Yes. The 20SDR includes internal self-testing components that continuously monitor alarm operation to ensure it is always ready to respond. This is separate from the manual test button, which tests the horn and electronics.
Is the 20SDR interconnectable with other Kidde alarms?
No. The 20SDR is a standalone battery-powered alarm with no interconnect capability. For interconnected protection, consider the hardwired 20SAR or 20SA10 DETECT-line models.
What does the 20SDR do when it detects smoke?
When the 20SDR detects smoke, it sounds 3 long beeps and flashes a red light repeatedly. The alarm continues until smoke clears or the alarm is reset.
# Kidde DETECT Smoke Alarm, AA Battery Powered **Model:** `20SDR` **Brand:** Kidde **Category:** Smoke Alarm Battery > The Kidde 20SDR is part of the DETECT line and uses enhanced photoelectric sensing to reduce false alarms often triggered by cooking. Powered by 2 AA batteries, it provides continuous protection even during power outages. Self-testing internal components ensure the alarm is always operating as expected. Three long beeps with a red light flash indicate smoke detection. A twist-and-click mounting bracket simplifies installation. Battery should be changed every 6 months or when the low battery chirp sounds. ## Specifications | Attribute | Value | |---|---| | Product Type | Smoke Alarm | | Alarm Type | smoke | | Sensor Smoke | photoelectric | | Power Source | battery-aa | | Battery Backup | No | | Battery Type | 2 AA | | Battery Replaceable | Yes | | Voice Alerts | No | | Smart Wifi | No | | App Connected | No | | Ring Ecosystem | No | | Interconnect | No | | Interconnect Type | none | | Wire Free Rf | No | | Self Testing | Yes | | Hush Feature | No | | Smart Hush | No | | Strobe | No | | Egress Light | No | | Alarm Db | 85 | | Ul Smoke | UL 217 | | Warranty Years | 10 | ## What's Included - alarm unit - 2 AA batteries - twist-and-click mounting bracket - quick install guide Source: https://www.jaspecs.com/kidde/smoke-alarm-battery/20sdr-kidde-detect-aa-battery-smoke-alarm/