I imagine this will be a thread with much debate, though in my experience Winamp for android was *atrocious*. My batt typically will get me through my work day of 8-5, with surfing on breaks and lunch, and listening to podcasts to fill in the actual 8 hours of work, with a little battery left to spare. The one day I had winamp on, it was dead hours earlier. I removed it that night, and had the expected battery life again the next day.