Many auto parts stores use a "battery saver" device that plugs into your cigarette lighter prior to the old battery being disconnected.
This sort of keeps critical computer components alive during that time.
For instance, one common problem that could occur without the saver is the "idle loses its memory". The idle might go up and down for a while until it "relearns it's idle". This might take some driving to get it right again, the battery saver might eliminate this headache and others, like "anti-theft" preventing it from starting (that would make your day!).
Call around to see if their store uses one.
Also lets (you) insure it is in place before the battery gets touched! People do get careless!
This might aid you also, see my link!
https://www.2carpros.com/questions/2001-dodge-neon-milage-just-want-put-fliuds-their-locations
Return with good results, let us know how it went!
The Medic
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Wednesday, July 12th, 2017 AT 8:05 PM