Hello everyone. I'm using a ESB MR Vader conversion kit from TCSS and I've opened up the ANH sound board, gutted the speaker and battery box,relocated the activation switch and clash sensor. Currently Im using 2- two AAA 1.2v recharchable NIMH batteries to keep the power in parallel like it was originally wired. Everything works but the question is can I go with more voltage and add a BP with a pair of 3.7 trustfires? Will there be a big difference? I'd like to change to a 2w speaker in the proccess as well and keep as much power going for both the speaker and LED. I spent some time reading and saw that the MR board already controls the output..just can't find that thread to be honest..