Other than servicing your fire extinguishers so that they will work when you need them, fire extinguishers which are properly serviced and maintained well also tend to have longer lifespans.
With regular servicing and maintenance, fire extinguishers can last for years before they require replacement. Some fire extinguisher suppliers in Singapore also provide maintenance services. These companies may be able to help to inspect and maintain fire extinguishers which they have supplied to you previously.
After servicing, the fire extinguishers which have been serviced should also indicate the dates when the servicing and inspection were done.
Besides that, your company would also be more likely to be able to make the insurance claim without issues.