Carbon Monoxide Alarm | K10llco Alarm memory CO Electrochemical Sensor 3 LEDs – Alarm, Operate and Fault End-of-life alarm alerts Test/Reset button Sealed-in 10 year lithium battery Kidde 10 Year Sealed Battery Carbon Monoxide Alarm | K10llco Sleek, lightweight CO alarm with a non-replaceable, sealed-in Lithium battery for ten years of continuous protection – meaning the user never needs to change the battery for the full duration of the alarm’s life. This slim, easy-to-use alarm is ideal for use in all living areas and can be installed on a wall or ceiling or used freestanding on a table or shelf. It is also easily portable so can be taken away on holidays.