phone heat and battery drain problem

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http://forum.xda-developers.com – i have su760 its on v20f baseband only on 2g and custom bluekernel and acura rom and its awesome but actually its heat up on usb charge and sometimes unpluged i dnt know why and ma batteiry drain so fast i dnt know whyyyyyy like 1 % every 2 min of just check menus wifi is off 3g is off bluetooth is off i cailbrate it but still same **** is it battery problem or not ? (HowTos)