Battery drops 70% in 1sec

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http://forum.xda-developers.com – Yesterday i installed the S'Perience ROM and it all went fine, smooth fast rom :) Today after 4 hours my battery was at ~80% YAY!! I was a happy man with my new ROM super friendly battery usage. But then a second later it was at ~10% :( Anyone ever had this before, the battery is a new 1500mAh i'm using for a month now. Normally it lasts 10-14 hours depending on my day. Maybe i should post this on the S'Perience thread, but i can't post there cause i'm a noob with less then 10 posts. I also can't attach a screenshot of my battery page because as stated above i'm a less then 10 pos (HowTos)