Battery Never Charges Completely After Flashing Cm9

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http://forum.xda-developers.com – hi, I've flashed CM9 stable on my girlfriend's Galaxy with CF-Root 4.4 kernel. Everything works fine but now the battery never charges at 100%, no matter how much time the device remain connected to the wall plug, it reaches max 50-60% also if the phone is switched off. Tried to: wipe battery stats use battery calibration app from market switched kernel to the latest semaphore nothing worked. the battery works fine since it reaches 100% if charged in any other SGS thanks! (HowTos)