Thanks for the heads-up on the shipping times... ordered a H600Fd Mk IV myself.
Which battery would you guys recommend for the light?
1) Samsung INR18650-35E, 8A, 3450mAh
2) Samsung INR18650-30Q, 15A, 3000mAh
The 35E should to deliver enough power during normal conditions but what about freezing weather?
Reason I am asking is that my current bike-light (H600Fw Mk II, EagleTac 3400mAh) will not switch to high power once its been running on medium in the cold airflow for a while.
I've never had an issue using lights in freezing weather. Except that run times are lower in my Zebralights since the PID stepdown is delayed. Of your choices, I prefer the 30Q since I can also use it in a hot rod like the Emisar D4. If that isn't a concern, just go with the 35E. Either way, please let us know if you experience the same problem with the Samsungs.