Sparklike devices are built to last for many years of services. In fact, GED calibrates and maintains devices today that are sometimes up to 8 to 10 years old. As with any other products, careful handling and annual maintenance/calibration of the device prolongs the device(s) usability. There isn’t a specific number of years to expect as the life of a Sparklike device because that is mostly affected by how the device is used on daily basis, but a general recommendation is 8 to 10 years.