They will install if you ask and it is not too difficult a job. It is not a requirement for them to do so. Be nice and don't come to them with a job even mechanics are annoyed by. If your battery is leaking and the connections are corroded to the point of needing new ones, don't try and make them do it.
They dont install any parts. A nice employee may help, but they are a retail location, not a service center.
I'm pretty sure they test and install batteries.
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