[Q] Audio draining battery.

---

I am finding that playing audio on my Radar seems to drain the battery pretty fast. I first thought it was because i was streaming music from Zune, but even when playing audio locally the battery drains much faster than my HD2 running WM6.5. For instance i charged the battery to 100% then disabled data and only played music at volume level 5 for 1.5 hours and the battery was down to 80%. Is this normal?