building a solarforce l2i. i am just going to use 3 x aaa's until i can afford a good charger and 18650's. i have a p60 drop in assembly and a seoul p4 emitter. will this work in direct drive? i have an ak 47 circuit board on the way from dx. can i use this? what batteries and charger do you recommend? very impressed with the quality of this light. night and day different when compared to my ultrafire c2 knockoff.