Smoke alarms typically use either a 9-volt battery, AA batteries, or in some cases, a lithium battery that can last up to 10 years. The type of battery depends on the model and manufacturer of the smoke alarm.
How can I tell if the battery in my smoke alarm is low?
Most smoke alarms will emit a chirping or beeping sound to indicate that the battery is low. This sound will typically occur in regular intervals (about once a minute) until the battery is replaced.
Why is my smoke alarm beeping every 30 seconds?
A smoke alarm that beeps or chirps every 30 seconds is almost always signalling a low battery. Replace the battery immediately. If it continues to beep after a new battery is fitted, press the test/reset button and hold it for 10–15 seconds.
How often should I change the battery in my smoke alarm?
It's recommended to change the battery in your smoke alarm at least once a year, or when the alarm emits a chirping sound indicating a low battery. Many people follow the routine of changing the battery when they adjust their clocks for Daylight Saving Time.
Can I use rechargeable batteries in my smoke alarm?
It is not recommended to use rechargeable batteries in smoke alarms because they may not provide a consistent voltage over time.
How long do smoke alarm batteries last?
A standard alkaline 9V battery in a smoke alarm typically lasts 12 months with regular use. Some premium lithium 9V batteries can last up to 5 years. Sealed alarms with built-in batteries are designed to last the life of the unit — usually 10 years.
UK Trusted Brand
Your electronics specialist since 1972
Free UK Shipping
On most items when you spend over £35
Easy Returns
Our returns portal makes things quick & easy
Support
Our friendly support team is here to help
Choosing a selection results in a full page refresh.
