I too am looking for a used Leaf and want to know how to evaluate the battery state. In particular I am looking at a used 2012SL in Southern California. The dealer posted a picture of the dash:
1) 41k miles
2) 12 battery capacity bars
3) Battery is about 75% charged (9/12), but 84 miles of range to go
4) Average economy of 2.9 mi/kWh
Does this mean it has a new battery? This new battery will have >100mi range?
Or could the dealer have reset it to give range and battery bars?
Should I expect LeafSpy to see >66Ah to agree with the Battery Capacity Display?
[EDIT] I called 1-877-nogas EV and they said the battery is original.
The capacity warranty expires in 10/2017, 60,000mi.
Perhaps it would be wise to steer clear of this car?