Kidde 20SDR Battery Smoke Detector
- Photoelectric sensor, smoke detector
- 2 AA batteries included
- 85 dB alarm, LED status lights
- 1.88 by 5 by 5 inches
- 13.44 ounces, white plastic
- 10-year limited warranty
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A photoelectric smoke alarm that runs on AA cells supplied in the box. It is a smoke detector only, with no hardwiring, interconnect or carbon monoxide function listed.
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ASIN: B0CX6RMV4BModel: 20SDRCategory: Smoke Detectors & Fire Alarms
Overview
A bedroom or apartment hallway gets this white Kidde smoke alarm, powered by AA batteries that ship with it along with mounting hardware and a user guide. A loud alarm and LED status lights complete it.
Its strength is simple battery operation with the batteries supplied. The limitation is that it is not a carbon monoxide alarm and the listing offers no wired or linked option, so every unit works alone.
Who it's for
Rentals, flats and individual rooms that need one more alarm are the natural use. Homeowners wiring a whole house, or who want carbon monoxide coverage, should pick a different style of unit.
Pros and cons
- AA batteries included
- Loud alarm with LED lights
- Mounting hardware included
- Batteries need replacing
- No linking function listed
Performance notes
A photoelectric sensor reacts to light scattered by smoke, which suits slow smoldering fires. Because it runs on AA batteries, regular testing and fresh cells decide whether it is ready.
Specifications
| Brand | Kidde |
|---|---|
| Model | 20SDR |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.88 x 5 x 5 inches |
| Item weight | 13.44 ounces |
| Capacity & performance | |
| Alarm volume | 85 dB |
| Upper Temperature Rating | 100 °F |
| Power & efficiency | |
| Power Source | Battery powered |
| Construction & materials | |
| Enclosure Material | Plastic |
| Color | White |
| Included components | |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 10-year limited warranty |
| Other details | |
| Sensor Type | Photoelectric |
| Alarm | Smoke detector |
| Builtin Media | 2 AA batteries, alarm, mounting hardware, user guide |
| Item Type Name | Smoke Alarm |
| Mfr Part Number | 21032816 |
| Operating Humidity | Up to 95% relative humidity (RH), non-condensing |
| Product Style | 10th Edition |
Closest rivals on specs
First Alert SMICO110 10-Year Smoke and CO Alarm- Item Weight 0.84 vs 0.7 pounds (+20%)
First Alert SMI105-AC Hardwire Smoke Alarm 10-Year Battery- Item Weight 0.84 vs 0.7 pounds (+20%)
First Alert SMCO100V-AC Hardwire Smoke and CO Alarm with Voice- Item Weight 0.84 vs 0.7 pounds (+20%)
Frequently asked questions
Is the Kidde 20SDR hardwired or interconnected?
No. The power source is battery powered, and the listing names no interconnect option.
Does the Kidde 20SDR detect carbon monoxide?
No. The alarm type is smoke detector with a photoelectric sensor.
Are batteries included with the Kidde 20SDR?
Yes. The listing names 2 AA batteries along with the alarm, mounting hardware and a user guide.