Copper Maratac AA is now available, but it has PWM.
there is bad pwm on the driver. I think it was less than 1Khz. I didn't try to estimate. Just thought it was annoying.
If it is true that the "Rev. 4" AA Maratacs have PWM (like Rev.2 and Rev.3) then that is unfortunate. On the other AA Maratac thread no one confirmed this either way, but the expectation was that the new drivers were constant current.
Hey gunga & jon_slider... do you have a Rev.4 AA in hand to confirm it has PWM? One way to tell Rev.3 from Rev.4 is that the Rev.4 driver has reverse polarity protection which should be visually identifiable, while Rev.3 does not.
Had so much hope for this light. :/ otoh, if it uses PWM maybe there is a better chance that 14500 3v/4v cells may work without destroying the driver. Actually, that isn't strictly true, but follows from Maratac's history.