At a recent home inspection continuing education course, the instructor outlined certain Kidde fire extinguishers that are prone not to work and easy to identify, as described at the Kidde website:

“There are two styles of fire extinguishers included in the recall: certain plastic handle fire extinguishers and push-button Pindicator fire extinguishers.

If the extinguisher has a gauge, the first thing to look for is a vertically oriented pull pin that is either fixed with two connections or hanging with a single connection.”

Here’s a link to the description:

https://www.kidde.com/product-safety-notices-fire-extinguishers-recall-id-guide