So I have got this odd problem with my 4s and the lightening charging cable (first one was of Targus and then bought a new 200 wali cable)...Now what happens is the switched off (battery presumably 0%) charges fine till like 3/4% and when the phone turns on automatically, The charging cable fails to function and doesn't charge anymore no matter what. I have a journey ahead in few days and this is really annoying me please help me...