Lots of useful information. Thanks everyone.
So far, I tried battery tender. Got the battery to 13.5+V on rest. After 15 minute disconnect/reconnect, I tried restarting the car with no luck. After failed attempt to start the car, the battery drops to around 12.5V.
Will try the headlamp test to...
Thanks for the quick reply.
Are battery tenders good to use on Leaf?
What should the voltage output show ideally, so I can at least remove that as suspect once I charge the 12V battery?
Also, just making sure - disconnecting the 12V battery does clear out codes right?
I put the leaf (2013 model, 51k miles) to charge overnight. In the morning it won't start.
* Dashboard turns on, AC, radio, etc. works fine, display shows 56 miles range. However, the leaf just won't start. It shows red and yellow warning sign, and car warning sign on the dashboard.
* I also...