I arrived on site and checked in. I proceeded to do a monthly fire extinguisher inspection. Checking each fire extinguisher's gauges, checking for obstruction in the hose and also marking the tag. I found several needed replaced on the walk through. I also found some had been used and needed to be recharged. I took care of them and got the customer current with working fire extinguishers. I finished the walkthrough and let them know the next date that I would be there next month.