I thought this was worth a repost , hope it helps someone
The FireAngel SB1-TP-R Smoke alarm is fitted with a 1 year replaceable battery. The enhanced optical sensor ensures that there are less nuisance alarms from daily cooking fumes.
Fireangel optical technology gives complete protection against all types of fires, including slow smouldering fires, which traditional ionisation alarms are slower to react.
- Optical smoke sensing technology detects slow smouldering fire
- Resistant to nuisance alarms
- Ideal for grade F installations where cost is a priority
- Large central test and silence button feature
- Product life span: 10 year. Battery life: 1 x 9 V 1 year (replaceable battery Included) replaceable battery Included
- Sounds a loud 85 dB alarm
- Certified to BS EN 14604: 2005
- Can be used in the bedroom, living room and landing