Support is my battery dead or can a rom kill your battery quickly?

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http://androidforums.com – Ever since trying out the Liquid Rom my battery has taken a dump...its worse today. I was at 100% around 10AM...by 1:30 I was down to 1% just from watching 5 mins of a movie, light web browsing and a lot of texting. Now its plugged in and taking FOREVER just to get to 5%...got to 9%, took it out for 3 panorama photos, 2 texts and it was down to 2%...wtf? I have a 5400mah (sp) battery coming tomorrow. (General)