Having abit of trouble with the audi, when I come to start it up at night it needs jumping, done this for past 3 nights now. Got my hands on a multimeter this morning and tested the battery before I went to work and it had dipped to 11.84v then when I came back tested again and it was 11.72v, jumped the car again and tested the charging voltage and it was 14.2 volts. Am I right in thinking its time for a new battery?