the wifes 2010 ford ka died on her today and when ive getting home i tried to start it and it wouldnt turn over just clicked, now i put the multimetre on the battery and its saying 12.2 volts, then i jumped the car and got it running and put the multimetre on the battery again and its reading 14.4 volts, even when i turned the radio and lights on. drove it around the block and turned it off and it wouldnt start again. would you say the batterys finished? just thought id ask before i get a new battery.