I've done the CR123 battery route and just don't care for it. I do just fine on regular batteries. Right now all my flashlights use AA batteries and I am well pleased with them. I am looking at solar chargers the JJ and MB have, but don't know how much amperage I need to charge 2-8 batteries at a time. Actually probably only 2-4 batteries, BUT if I was to get some of the AA flashlights they take 8 aa batteries.