I received an SC600 MKII L2 from the latest IS batch a couple of days ago. It has the best fit and finish (centering of LED, cleanliness of lens/reflector assembly) of any Zebralight I’ve ever owned before, so that’s good. The tint is very good too, there’s a relative shift towards green on the lower modes but it makes my SC52w look bad even on matched output levels (and I thought I’d got lucky with a decent tint on that one). I’d say it’s a 4D leaning towards 5A tint on the highest mode, which is about perfect imo, then moving down to 4C/B and towards 4S on the lower modes.
The beam is noticably tighter than my MKI SC600. The improvements to the UI and PID are nice too.
I’ve also noticed that the switch is much softer than previous versions. Previously I have had an H501w (soft switch), SC51w (soft/medium switch), H51 (soft/medium switch), SC600 (hard switch), SC52w (hard switch). This latest SC600w MKII has a softer switch than any of my previous Zebralights, including the H501w. The click is still there, and I think it actually makes changing modes easier with my index finger when held like a pencil, but for thumb clicking it seems to lack the solidity of my old SC600 and inspires less confidence in the robustness of the switch and reliability of mode changes. Time will tell if I get used to it I suppose. This softer switch has been confirmed by Zebralight to be a consistent update in their future models due to a change made by their supplier for that part.
With regards to the battery indicator, the 1-4 flashes are not representative of the voltage ‘to the nearest volt’. They are an arbitrary measure meant to represent <25, 25-50, 50-75% and >75% charge in a way that is easily understandable to people unfamiliar with li-ion chemistry and voltages.