kugr wrote: ↑
Fri May 22, 2020 6:37 pm
My Nissan Leaf battery has died after more than a month of being left in the garage because of Covid-19. I now realize that I needed to disconnect the 12 V battery which I will be doing in the future.
I tried to start the car and run it for 10 minutes near the house recently. However as soon as I got back into the garage, the car would not let me shut it down saying that I needed to press the brake pedal even when I had it pressed down. I could not shut it down no matter what I tried. It even gave me a T/M system malfunction error. Now the battery I believe has no charge in it.
Can you suggest which 12V battery I could buy and replace the current one with.
I read in another post that Optima Yellow Top 51R might be a good replacement. Is this true? Are there any other options in the group size 51R range.
Thanks in advance!
Did you leave the car plugged in (after charging complete) while it was parked? Did you leave something connected to the OBDII port (such as a Bluetooth adapter for Leaf Spy)? Either of these actions will keep the computer modules in the car active which increases current draw from the 12-volt battery. The car will periodically turn on the DC-DC converter to charge the 12-volt battery when parked for extended time, but anything that keeps the control modules from going into deep sleep may interfere with that periodic charging. I routinely park at either the airport or my office for extended time without issue except for the one time I forgot to unplug the Bluetooth adapter from the OBDII port.
Although I like the Yellow Top, the Bosch Platinum is another AGM battery that is available in 51R size. I strongly recommend an AGM battery because they typically have lower internal resistance so they recharge quickly from the DC-DC converter.