I have recently modded my 2d maglite to a 3x123, and now I'm looking into alternative methods to supply 9 volts. Mainly because 123s are extremely expensive where I live and I don't want the hassle of ordering them off the internet all the time. Just now I thought of something. Would running 3x9volt batteries in parallel work well? It seems as though they would fit with relative ease. Help greatly appreciated, thank you!