The Kidde 20SD10 is part of the DETECT line and features a 10-year sealed battery — no battery changes for the life of the alarm. Enhanced photoelectric sensing reduces false alarms often caused by cooking. Self-testing internal components ensure reliable operation around the clock. Three long beeps with a red light flash signal smoke detection. The twist-and-click mounting bracket simplifies installation. When the 10-year battery reaches end of life, the alarm chirps to notify replacement.
Does the 20SD10 ever need a battery change?
No. The 20SD10 has a built-in 10-year sealed battery that cannot and should not be replaced. At the end of 10 years, the alarm will chirp to signal that it is time to replace the entire unit, eliminating surprise late-night low battery chirps.
What sensor does the 20SD10 use?
The 20SD10 uses a photoelectric sensor as part of the DETECT line. The enhanced sensing technology is designed to detect smoke quickly while reducing false alarms from cooking — a common complaint with ionization-only alarms.
Does the 20SD10 self-test?
Yes. The 20SD10 includes internal self-testing components that continuously monitor the alarm to ensure it is always ready to respond. Kidde also recommends pressing the test button monthly to verify the horn and electronics are working.
What does the 20SD10 do when it detects smoke?
When smoke is detected, the 20SD10 sounds 3 long beeps and flashes the red light repeatedly until the alarm is cleared. There are no voice alerts on this model — for voice, see the 20SD10-V.
Is the 20SD10 interconnectable?
No. The 20SD10 is a standalone battery-powered alarm with no interconnect capability. For interconnected protection with a 10-year sealed battery, consider the hardwired 20SA10 DETECT-line model.
# Kidde DETECT Smoke Alarm, 10-Year Battery Powered **Model:** `20SD10` **Brand:** Kidde **Category:** Smoke Alarm Battery > The Kidde 20SD10 is part of the DETECT line and features a 10-year sealed battery — no battery changes for the life of the alarm. Enhanced photoelectric sensing reduces false alarms often caused by cooking. Self-testing internal components ensure reliable operation around the clock. Three long beeps with a red light flash signal smoke detection. The twist-and-click mounting bracket simplifies installation. When the 10-year battery reaches end of life, the alarm chirps to notify replacement. ## Specifications | Attribute | Value | |---|---| | Product Type | Smoke Alarm | | Alarm Type | smoke | | Sensor Smoke | photoelectric | | Power Source | battery-10yr-sealed | | Battery Backup | No | | Battery Type | 10-year sealed lithium | | Battery Replaceable | No | | Battery Life Years | 10 | | 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 10th Edition | | Warranty Years | 10 | ## What's Included - alarm unit (battery pre-installed) - twist-and-click mounting bracket - quick install guide Source: https://www.jaspecs.com/kidde/smoke-alarm-battery/20sd10-kidde-detect-10year-battery-smoke-alarm/