Looking at purchasing an imported 2014 Leaf for a price I am happy with. Unregistered at the moment but will be registered on sale. Has been changed to English. Only 18K on the clock. The guy lives at Camp Hill and has several Leafs (Leaves?!) For sale. Says his brother arranges the purchases in Japan and they ship them out here. Just trying to do due diligence before the purchase...
Plug it into the Leaf connection in the panel below the steering wheel.
Install LeafSpy on your phone, to talk to it from your phone. Look at the health of each individual battery cell. If the battery cells look irregular, or one is off (red, or visibly below all others), don't buy it.
Slower diagnosis: Alternatively (and probably more valuable), drive car to full discharge, take it to a westfield car park and fully charge it for free with the service whose app that tells you how much charge went into the battery. It will take ~6 hours. Total charge capacity should be 24kWhr from new; and there is warranty up to 80% (but it takes 6 months to get a replacement battery). How much charge it can take in will tell you how healthy the car battery is. That's the most important thing.