I have attempted to run 2 rhino 2s 1250 mah lipo packs in series a couple of times and have had horrible results. Im running it in startard NIMH mode on the esc in order to bypass the lipo cut off. When I attempt to drive it the esc glitches like crazy!!! Applying full brake for no reason, shutting off for a couple seconds at a time. The esc temp was less than 120 degrees. I have no idea what's going on. please HELP ME.