Well from Few weeks I also having Same kind of problem in my Fb14.. When I went to the battery Shop They say mY battery is Ok (Not Excellent) The Problem is with my Alternator (I have replaced my Alternator 2 months ago as I had problem with the one been there.. Actually they said I had B13 one) But now when I check my Alternator the Electrical guy said there is no problem... But today also Car suddenly Stopped & when I try to start it act like my Battery Gone Down.. My Bat is 40 AMP one.. Any one can guess what’s the problem.. & What the Best AMP for B14..