Hi Giles,
Thank you for the info, I won't be able to have any road vehicles as my time period is pre 1900 and I don't fancy fitting radio control to an early traction engine.
When I return from holiday I shall order the parts I need from the Deltang site and set it up with some ordinary AAA batteries in an LNER Smplex petrol shunter which looks like a garden shed on wheels.
Then if successful I can then sort out rechargeable batteries.
Thank you once again,
Les.