Joined: Aug 2010
Posts: 12,760
Likes: 2,114
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
If you can run your light on a lower power setting, the batteries should last longer. I am not familiar with the light, so I do not know if that is an option.
I like the Ikea low discharge Ladda 2450ma AA batteries. I use them in a lot of AA applications. But they probably would not give much longer life than the Eneloops do. And this is only a good idea if you live close to an Ikea store, otherwise shipping might cost more than the batteries.