well just got back from 2 weeks in florida and the saph wont start used the booster pack then took battery off and charged it over night still nothing so used my mates jump leads today worked straight away but soons i turn it off it wont start again when we jumped it again there was spaks from the jump lead and i think it's the alternator was glowing and smoking so what do people think do i need new battery or both or is it something else sorry i dont really know much yet

p.s even when you charge the booster pack for hours soons you connect it to the battery it drains it