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oldtimer
Yep my 1553 was going in for calibration and the votage was 9v so popped into Tesco and got buy 4 Duracell Ultra for £4.75p and get 4 free on Thursday and when they were selling their energy saving lamps for 10p each a got a pile of them for the motor and garage and I must have got 200 over a period of time now I have about 60 left as I charge the letting agen £4 per lamp .