What is a 10 year sealed smoke detector?

Recently, my uncle (my father's brother) called me. he said that he has to replace the battery of the smoke detector that is just use one year because that battery is get out of power. then my uncle asked me if I  can recommend him a smoke detector without replacing battery frequently. of course, our company sumring develops and sells these fire alarm products, I at once recommend a 10 year sealed smoke detector for my uncle.

speak of 10 year sealed smoke detector，what is it ？maybe someone do not about and Let me explain it.
10 year sealed smoke detectors are powered by sealed lithium batteries that have a life span of ten years. These alarms provide 10 years of continuous protection with no need to replace the battery for the life of the alarm.10 year sealed smoke detector provide up to 10 years of continuous service.

Although the 10 year sealed smoke detector can be used for 10 years, this is true, but we also need to take care of it and clean it from time to time to prevent dust and other things from entering the detector and affecting its function.

My uncle's family is now using the 10 year sealed smoke detector I recommended to him. Although it was only installed and used for a few days, he was very satisfied with the product appearance and performance. Really good!
Can you want to try it? click it ：10 year sealed smoke detector