I took the easy route, I did an LC+ Camelback with NiMh battery packs. Once I doubled them up and gave it full voltage, it has full function. Based on the battery pack ratings and the current draw in operation with a load, I figure I should easily get three hours out of a charge. Since the LC+ already runs on direct RF communications, all it really required was adding the battery pack!
I have to admit, you are 100% correct. You already have everything you need in LC+ to go battery. Adding or changing boards would not make much sense.
BTW... the PS3 board for inspection should arrive today.