As many of you know sony ditched the external dry battery pack from their past models (m100, etc.) instead opting for charging via USB for the mz-rh1. Does anyone know of a safe, reliable, convenient remote power source for the mz-rh1? I don't know the units power consumption (I thinks its like 5 V but I haven't ordered one yet am unwilling to unless I can power it remotely for those long festival days.) I've seen external li-on batteries with like 3400 mAh which would give me like 30+ hours of linear PCM record time but I don't know if this will work for the mz-rh1 (they advertise them for ipods and psp s). Any help would be greatly appreciated. Thanks.