Here’s some mod threads to get you started. Doesn’t look too hard to me. Nothing is glued together, and everything seems to come apart nicely. Looks like resistor direct drive. Simply jumping one of the resistors more than doubles current draw to 2A with eneloops, according to one member. I’d start with that and ditching Alkaline AAA and upgrade to NiMH. Next mod up from there (and a significant one too imho) would be working in a 26650, 18650 or 25500 cell.
