I own an iPad which comes with a USB power adaptor. It is marked: 5.1v, 2.1 amp, and 10W. I have ordered a Start 20 Europe (should arrive tomorrow) which I was going to use quite a lot outside a car, so I need to be able to charge it from the mains. The TT mains power adaptor is an ‘optional extra,’ so avoid the ‘extra?’ Please could someone advise me if I can plug the TT USB cable into the iPad power adaptor, without causing damage to my lovely new Start 20? Is iPad USB power adaptor compatible for a Start 20? Please advice. Thanks.