Greetings! I'd like to know what file (type and bitrate), settings, and headphones/IEMs were used for testing the claimed battery life for both SE and Balanced Out. I'm interested in buying the M2X, which, for my case, will be used to listen to DSDs and FLACs through a HiSenior B5+ IEM that has 20ohms of resistance. I only listen at moderate to low volumes. I'm curious if your 10.5/7.5hr playback time could be stretched further given my usage.