If you're unfortunate enough to require a new battery you
don't want to be adding to things by locking your radio too, so make sure you
have your code available for when you've finished.
The roadster uses a very common battery found in alot of
cars (makes a change for something to be standardised with the rest of the
market), It can be bought in any motor factor under the UK part number: 063,
this is a 12v 43Ah unit.
In order to access the battery, remove the bonnet bin first.