I've only used the Swift, which I'm pleased with, but I did consider the Nao+ too. The review on here of the Swift a couple of years ago had a thread with some comparisons with the Nao+, which I found quite helpful in making a decision. Ergonomic adjustable headband adds stability in dynamic activities eg. mountaineering, trail running, skiing Stuff it doesn’t have? Any sort of red light front or rear-facing – bear in mind the headband is reflective – any programmability, which I honestly didn’t miss given that I had as much or as little light as I wanted at all times. And the option of a remote battery box for really cold conditions. If you want those, look elsewhere, maybe at the bulkier, clunkier NAO+ which also has a more glove-friendly control system. The complexity of testing the exact timings of the SWIFT's burn time because of RL don't necessarily make this aspect of testing any easier, but having put the SWIFT's battery in the freezer overnight its power was seemingly unaffected (or, if it was, then it was barely noticeable). As such, this should allay the fears of anyone looking to use the SWIFT RL through the colder and more miserable months of the year (which just happen to be the darker months of the year too). Batteries and Charging

Petzl Swift RL Review - 900 Lumen Reactive Headtorch Field Test Petzl Swift RL Review - 900 Lumen Reactive Headtorch Field Test

Longer burn time, greater visual comfort and less manual operation with REACTIVE LIGHTING® mode, which allows the light sensor to automatically adjust brightness and beam pattern, optimizing battery usagePlease note that inflatables such as sleeping mats are not considered as faulty if they become punctured during use and are not covered by the manufacturer's warranty in this event. Note, too, that while the Nao had the option to swap the reachargeable battery for AAA batteries, the Swift does not. You need to buy a spare rechargeable battery if you plan to use the head torch for many hours.

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The Swfit is said to be “weather resistant”. This is not waterproof although I have taken the torch out in Scottish rain and it seems to remain operative. So I am pretty blind/clumsy and having a nice bright head torch has done wonders for me. I have had a SWIFT RL for about a year and I thought it was brilliant. However, the battery life was not the best which I found out whilst descending off the Cuillin ridgeafter getting rather lost.I have unfortunately somehow misplaced my SWIFT RL and before I bought a replacement I thought perhaps the NAO+ might be a better fit for me because of the better battery life. I was wondering if anyone had/used both and couuld compare them for me? Is the NAO+ about as bright SWIFT RL (I know on paper SWIFT RL is brighter) in reality, is the beam pattern similar and the colour of light? I should also say that I normally use it in the reactive mode which I have found very useful. The reactive lighting sensor is the circle to the right of the main light 3. Petzl Swift RL headtorch Reactive Lighting Technology If you are running with someone else wearing a head torch, the Swift reduces its beam. I guess it thinks that between the two of you there is enough light for you both to run. Except, this is not the case. I like my own full beam to light my way and I don’t want to have to rely on someone else’s beam. In a nutshell, it uses a light sensor to automatically adjust the strength of light depending on how much light is around you.The REACTIVE LIGHTING® technology, uses a sensor to analyses the ambient light and automatically adjusts the brightness to your needs. Having bought a NAO and not particularly liking it, I’ve returned it and bought a Swift with an extra battery and have spare change. Users of Petzl's rechargeable CORE battery will be on familiar ground here. Due to its output the SWIFT RL requires a larger battery than its cousin the ACTIK, hence there is no compatibility between the two - something that may annoy some of our audience. However, when you think about the SWIFT's greater lumens and burn time, it's quite clear why. The SWIFT is providing a heavyweight amount of lighting within a lightweight and compact exterior.