I'd call ahead to ask them. It could be seen as presumptuous to show up expecting them to perform car maintenance tasks as retail store employees.
Yes you just show up and they will do it but it just depends how busy they are. You will just have to wait your turn. I don't think they actually make appointments they're not like a repair garage
I'm sure that you just have to show up and they will just come out and swap batteries for you without having an appointment.
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