Battery degradation must be monitored to ensure quality depth of cure. If you want a 10-second cure, you'll need to monitor frequently.
If not, diodes will heat up over time and degrade output, causing loss of intensity.
This feature is beneficial for hygiene, but residue and etched-in mineral deposits from repeated autoclavings can cause degradation.*
If so, you may not be getting the intensity of light needed for a complete cure.
Accidental rough handling can seriously damage light intensity.