Found the above to be showing only 12 .53 so put it on charge using C TEK 7000. Charged it up, but after 24 hours it was back down to around 12.56. Emailed Elecsol who said it was down to low temperatures, and the battery will lose 1% per degree below 20 degrees, but will recover naturally when the temperature has risen. ( In the Wickersham manual, it says 1% below 25 degrees ) I asked them how they did their calculations,bearing in mind that the temperature here was 7 degrees at the time in question, and they replied that I should discharge the battery to 10.5 volts a couple of times and it would recover?? Anyone know the answer?