Customer was on my list to get done for my normal work orders. I called and got them on the schedule for their annual fire extinguisher inspections. I arrived and did a quick walkthrough to check for placement of the fire extinguishers. I then removed the fire extinguishers one by one and got them inspected and maintenanced as needed. I wiped them down and put them back in their positions. I let the customer know that I would call her next year around the same time to get her on the schedule for the inspection again. I let her know that if she had any that were used in the meantime she could call and I would get it refilled and ready for service.