It's an 07 and you replaced the battery already? Should have gone another year or two at least.
What kind of battery did you put in it? It sounds like either the alternator died (killing the battery and killing the new one already) or the new battery is not up to spec. Or there is a slow drain somewhere, which killed the first battery and will continue to do so.
The dealer needs to run some electrical diagnoses. Battery and alternator checks, specifically.
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08 Altima 2.5 CVT
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