[Q] Forcing Deep Sleep while USB Connected

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http://forum.xda-developers.com – hey guys on my last mountain bike session my s2 got a little wet.. since that its bugged. it allways "thinks" it getting charged by usb, even when its not. after some google reserch i found out that the device wont go into the deep sleep mode while connected to usb. so my question is: is there a way to force the deep sleep while connected to usb? or is there a way to disable the usb connection? i lose 40% of my battery over night becouse of this.. (HowTos)