Sorry, the email associated with this website I don’t monitor and so I did not see your question.
I installed this system when the LEAF was 4 months old. The original battery lasted till 49 months and 52,000 miles.
Here’s a post when I replaced it.
ccduncan wrote:Just found this post. Have you had any issues with the 12v battery draining with those amps? I am about to install an amp and sub in my "19 Leaf but I'm a little hesitant based on research I've found so far.