I'll have to checkout that Coast. Thanks for the detailed review and pros/cons.
Here's some info on the AAA lights I have:
Fenix E01, OLight I3S EOS, Maratac AAA Copper
Specs:
Fenix E01:
Single Mode: 13 Lumens 16 hours
14 grams (without battery)
$10
Olight I3S EOS:
Moonlight: .5 Lumens 60 hours
Low: 20 Lumens 8 hours
High: 80 Lumens 35 mins
11 grams (without battery)
$20
Maratac AAA Copper
Low: 1.5 Lumens 55 hours
Med: 40 Lumens 7 hours
High: 138 Lumens 70 mins
27 grams (without battery)
$48
Quite the range in price and features. The Fenix I keep in my camera bag. It's cheap and handy and not complicated. Single mode, turn it on turn it off by twisting.
The Olight is in my HPG Kit Bag. Still pretty cheap, but more modes, including a nice moonlight mode for reading or whatnot that'll run a long time. Also a twisty.
The Maratac is my favorite of the 3 I have in this size. Mainly because of the copper. 3 modes similar to the Olight, but a little more output at each mode. And again a twisty.
Comparing a AAA light to a CR123A light:
As you can see, the CR123A Olight S1 Baton is just a touch shorter that the AAA Maratac, but is quite a bit fatter.
S1 Baton specs:
Moonlight: .5 Lumens 25 days
Low: 8 Lumens 40 hours
Med: 80 Lumens 6 hours
High: 500 Lumens (steps down to 300 after 1.5 minutes) (can function as a hand warmer on high LOL)
68 grams (without battery)
$65 (for copper - $50 for Alum)
Comparison with their batteries and compared to a AA battery for size: