Phlogiston
Enlightened
Sure, but that's the rated voltage for this light. There must be a safety margin, or someone would stick a 4.35V Li-Ion cell in, hot off the charger at up to 4.4V, and fry the driver.maximum is 4.35V
Some lights rated at 1.5V will actually run perfectly well on Li-Ion, simply because the driver components happen to be rated at higher voltages than they strictly need to be. It wouldn't surprise me if the same effect came into play for a driver rated at 4.35V to allow something on the order of 6V.
On the other hand, I'm not sure how the LED would react to direct drive at 5.4V, now that I think about it...
You'll gather that I push my equipment from time to time