First Alert Lithium Battery Smoke Alarm
The First Alert FG250LB (BRK series) is a lithium battery-powered smoke alarm featuring a 9V battery supply and a comprehensive feature set for first-line fire defense in residential and light commercial applications. Its compact 4.25-inch diameter white housing mounts to ceilings or walls and delivers reliable ionization smoke detection with a long-life lithium battery.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | First Alert |
| Model | FG250LB |
| Power Source | 9V Lithium Battery |
| Diameter | 4.25 in. |
| Dimensions | 1.6 H x 1-3/5 D in. |
| Color | White |
| Mount Type | Ceiling/Wall |
| Housing Material | Plastic |
Applications
- Residential fire detection systems
- Light commercial building smoke detection
- Hotel and hospitality guest room installations
- Multi-family residential unit smoke alarms





