in 13 offers
The lowest price for First Alert Battery Smoke Alarm smi100 right now is $35.60 at desertcart.com.au, compared across 5 retailers.
The all-time low was $34.78 on 5 Sept 2026 — today's price is 2% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 4 Oct 2026.
First Alert Battery Smoke Alarm smi100
Last updated at 04/10/2026 16:36:31
Battery Smoke Alarm
Delivery between 11–14 Oct $29
First Alert Battery Smoke Alarm | SMI100
Delivery between 9–13 Oct $41
Battery Smoke Alarm
Free delivery between 14–16 Oct
Sensor de humo de baterÃa SMI100 Marca: First Alert
Delivery $136.91
First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack
Free delivery between 14–16 Oct
| Detected Substances | Smoke |
| Sensor Type | Ionization |
| Detection Method | Precision Detection technology |
| Detection Range | 10 ft (receiver range) |
| Certifications | UL Listed |
Battery Smoke Alarm
Delivery between 11–14 Oct $29
First Alert Battery Smoke Alarm | SMI100
Delivery between 9–13 Oct $41
Battery Smoke Alarm
Free delivery between 14–16 Oct
Sensor de humo de baterÃa SMI100 Marca: First Alert
Delivery $136.91
First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack
Free delivery between 14–16 Oct
| Detected Substances | Smoke |
| Sensor Type | Ionization |
| Detection Method | Precision Detection technology |
| Detection Range | 10 ft (receiver range) |
| Certifications | UL Listed |
