First Alert Onelink I Have A First Alert Kitchen Fire Extinguisher. It Is Dated 1989. Is It Still Good?

I have a First Alert kitchen fire extinguisher. It is dated 1989. Is it still good? - first alert onelink

When the test button on the green roof that appears to save, as he must, if it is good, but I'm afraid to trust him after 17 or 18 years.