Not sure what the factory warranty is
Here it is:
ORIGINAL EQUIPMENT BATTERY COVERAGE
(For replacement battery coverage, see page 43)
The coverage period is 36 months or 36,000 miles,
whichever comes first. A defective original equipment battery
which is unserviceable within the first 12 months and 36,000
miles will be replaced free of charge. After 12 months but
within 24 months and 36,000 miles, you will pay 50% of
the replacement battery’s suggested retail price plus any
applicable taxes. After 24 months but within 36 months
and 36,000 miles, you will pay 75% of the replacement
battery’s suggested retail price plus any applicable taxes.
Nissan will pay the rest, including all labor to remove and
replace the defective battery.