Real-world reliability of cordless curing lights

Quick question for those using the newer dual-wavelength cordless lights with active cooling: are they staying consistent past the first year? We’ve tracked a 0.8% warranty rate over 12 months ([redacted]) and less than 5% output drift from 1,200 mW/cm2 on bench tests, but I’m curious whether you’re seeing battery fade or fractured light guides in daily use.

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I’ve had one of those cordless lights for over a year now, and it still shines like the day I got it. I did notice a slight decrease in brightness, but it didn’t affect my daily use much. Do you think maintenance plays a role in prolonging their lifespan?

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