Ionisation Smoke Alarm with Self-Charging (BK770MRL) is a reliable and efficient fire safety device designed for fast detection of fast-flaming fires. Engineered for homes that require an advanced, low-maintenance fire alarm solution, this unit is ideal for upstairs landings, hallways, bedrooms, and general domestic installations.
With a sealed, self-charging lithium back-up battery, this alarm eliminates the need for battery changes throughout its lifespan—making it an excellent choice for properties where maintenance access is limited or inconvenient.
Key Features and Benefits
Fast Detection for Enhanced Safety
This ionisation alarm quickly senses fast-flaming fires, providing early warning when seconds matter most. Perfect for areas where fires can spread rapidly, ensuring maximum household protection.
Self-Charging Lithium Back-Up Battery
- Features a sealed, self-charging lithium battery designed to last the lifetime of the alarm.
- No battery replacements ever required.
- Ensures continuous protection even during mains power interruptions.
Hard-Wire Interlink Capability
- Supports interlinking of up to 12 compatible alarms within the same series.
- When one alarm activates, all connected units sound simultaneously.
- Provides the earliest possible warning throughout the property.
Compliance & Certification
- 230V mains powered with lithium back-up.
- CE marked and Kitemarked to BS EN 14604.
- Suitable for installations meeting BS 5839-6: 2019 Grade D1 standards.
- Fully compliant with the 2022 Scottish fire alarm legislation.
Convenient & User Friendly
- Test and hush button for easy operation.
- Push-fit base plate for quick installation.
- Designed for reliable performance in domestic environments with 10%–85% relative humidity and +5°C to +38°C operating temperature.
Long Lifespan & Warranty
- Full 5-year warranty from date of purchase.
- Although manufacturing dates may be——-the alarm provides a full 10-year operational lifespan and warranty validity upon purchase.
Technical Specifications
| Specification | Details |
|---|---|
| Product Code | BK770MRL |
| Alternative Codes | BK770, 770, 770MRL |
| Power Source | 230V mains powered |
| Back-Up Battery | Self-charging lithium battery |
| Dimensions (HxDia) | 53 × 140 mm |
| Operating Temperature | +5°C to +38°C |
| Relative Humidity | 10% – 85% |
| Sound Output | 85 dB |
| Weight | 0.28 kg |
| Warranty | 5 years |
Installation Notes
This model is not a direct replacement for older alarms from previous series (e.g., models using alkaline batteries with twist-on bases).
When upgrading from older systems, rewiring by a qualified electrician may be required.
