There are so many to choose from excellent and many excellent options from Petzl of course. I still have a Myo XP belt (3xAA batteries), so I share your concerns about their smaller brothers the humble AAA. As an alternative there's a good option from Black Diamond if you've not considered it, the Icon Polar which has the detached battery pack for 4xAA batteries. Powerful and good quality. Buy online and you've time to test it out or return it.
Could be a tad heavy though...
Coming up for my 5th Spine and will use LED LENSOR H 7s again. Several reasons for this : Apron 16hrs burn time , Good fine beam zoom function to pick out gates, The price £21 each! ease of controls. light weight, easy to wrap around wrist for running in fog when you need the beam near the ground. I carry 2 on me at all times so I can just swap without pausing to change batteries. I have a spare 3rd H7 in my drop bag in case of accidents. Have used Duracell Ultra AAAs in the past but now tempted to use Lithium . Sometimes get low burn times on the Lithium for no apparent reason? Only downside of the H7 is that the on off switch can be turned on by mistake in your pack! problem can be solved by carrying them in the pouch provided and stitching the pouch to your waist belt.
Apologies if i am hijacking this thread - I used a headtorch that was splash proof i.e. IPX rating of 4 this year which failed on me so I am looking to replace with a unit that has a rating of 7 i.e. waterproof. I like the features of the Nao (n.b. it wasn't this unit that failed on me) but it's no rated to 7, any suggestions please?
It appears reactive and waterproof can't be done - according to my web searches anyhow. The Black Diamond looks good but read a review about one getting waterlogged so i'm not sure. Does anyone have experience of the Princeton Apex Pro? Odd battery size may be a bit of a pain
dammit should read more before posting buttons are fiddly (on the Apex Pro) by all counts. Search continues.
Most of the Fenix range look waterproof.