Hi,
In the handbook, it says do not leave on charge for more than 24 hours. Unfortunately, I read this after I had overcharged it several times and had to replace the battery, which costs £10.95. It also says you should discharge the battery completely once a month and then recharge it fully as it prolongs the life of the battery. My machine is back to fully operational now and is really good, but it should not be left on charge permanently. The result of overcharging the battery is that it does not hold a charge for very long at all. My husband, who is a Science teacher did explain the Science behind what happens to the rechargeable battery if it is charged for too long, but I didn't follow it too well - something to do with chemical changes inside the sealed battery and loss of electrolyte.
I just thought I should warn people buying one of these machines to read the handbook more carefully than I did initially......
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