Talk Morgan Forums Community The Malvern Arms Sat Nav without power point

I could do with a Sat Nav but I don't have a lighter/power point in my 4/4 (as far as I know!).

I pottered down to Halfords assuming that I could get a battery operated one but was told that only hand held models had this facility. Apparently all of them have an internal back up battery but this only lasts an hour or so and takes a few hours to charge. I don't want to "hard wire" anything into the Morgan as my son will want to use it in his car when it's not being used in the MOG.

As we are planning a few longish distance trips from next month (U.K. only) I could do with something other than an A to Z.

Any ideas?

Thanks