i dont think an SVR batter would do that... this would be a long shot but do you have a car alarm? the kill switch kind where theres a chipped key and the car wont start because one freaking wire got lose... i went out and bought a new optima redtop too... pointless because it was just one loose wire...
and if it is your starter try knocking on it (with a hammer) tap it a couple oof times... not too hard but hard enough...
but if worse comes to worst, then check your battery current after a night of letting it sit..like at pepboys or summin.. and check your starter...
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