Just get RAC membership and then you dont have to worry about anything. Call them out for all those little jobs that you dont want to pay for labour for (new accelerator cables, changing leads). I know someone who even called them out to fill his wash bottle cos he didnt have any solution and was in the house anyway. They turned up, filled it up free of charge and toddled off. I always use the RAC when i need a new battery. Call them to my house, they do it for free and the batteries are reasonable too. No hassle. I would never change a tyre with RAC membership.