The NU35 is very versatile and offers you all features and full power either on the internal battery (USB-C-port) or on 3xAAA. We have a main LED, high CRI side-LEDs and a quite capable redlight. Max lumens is 460 for 15 min. Quality of light is excellent:
Thanks for your review! This seems a nice and versatile headlamp! Not high power but ideal for moments when you can use AAAs 
Nice!
THX! Most of the time I will use it on the internal battery. AAA is more of a backup. It is a great light and the output is enough for most typical headlamp applications.
I generally dislike the proprietary built in batteries, but will say that the Nitecore Nu17 headlamps stay charged for a LONG long time and the battery suffers no damage. Well over a year. I bought 3 of the NU35. I like the concept and Nitecore makes solid product.
Thanks for the review!
THX for watching. On some of the cheaper USB-Head-Lamps it is super easy to replace the LiPo-battery and even upgrade it. Don’t know about Nitecore though.
Those li-poly batteries only last around 3 years before capacity significantly drops. Good headlamps, but they are throwaway.