NHTSA Complaint #11450555 — 2019 NISSAN LEAF

About January 19, 2022 when the temperature was about -10 degrees F I drove my 2019 Nissan Leaf about 5 miles. When I turned on the car the battery level was at 60%. After I had been driving for about ½ mile I got a dashboard message that the battery was cold and power would be reduced. I got a similar message a few days before which did not result in any difference in power levels, so I ignored the message. At about 3 miles I had to go up a 10% grade hill of about 1/4 mile in length. As soon as I started up the hill and was accelerating I got the power reduction message again. At that point I was traveling about 50mph. Then in the next 10 seconds, and while I was about half way up the hill, the battery indicator on the dashboard dropped all the way down to 1%. The car lost all of its power and I had to pull over to the side of the road. As soon as I stopped the battery indicator started to rise and within the next 30 seconds had returned to 60%. I continued up the hill, and noticed that the power was decreasing and the battery indicator was dropping again. I made it to the top of the hill and stopped again. The battery indicator returned to 60%. I had to stop one more time to allow the battery to recover, but made it to my destination without further problems. Two hours later I started for home and the car operated normally. Between that day and February 5 there have been no further incidents, even though early morning temperatures have ranged from -7 degrees to -28 degrees on 13 days. I took the car to Freedom Nissan in South Burlington, VT on Feb. 2. However, they told me that there was no record of such an incident on the computer and they would do nothing without such a record. To have the car go from full power to zero power in a 10 second period is a very disconcerting experience. It should have provoked an error message in the onboard computer. I think this is a safety problem and would like you to look into it.