6 volt LED lantern joule thief
My question is if I might be just as well off to wire my AA four battery packs in a series/parallel circuit. First start parallel, then series as the batteries run down. This would give me a high/low control for the light, too.
The joule thief will only draw the batteries down so far, and the LEDs have a low voltage threshold. Since the light is engineered for six volts, I'm just wondering which way to go.