Our leaf is a daily driver in Florida so 80-90 degree weather in the
summer. You can see a photo of the failed battery here:
https://www.summet.com/blog/2019/05/03/nissan-leaf-12-volt-accessory-battery-replacement/
It had blue crystals forming around the top of one of the terminals, so
was definitely outguessing / leaking under pressure.
Jay
On 7/29/25 13:27, Lee Hart via EV wrote:
I would not be surprised if it is almost dead. 5 years appears to be
about the standard runtime for most car accessory batteries. [I've had
the one in my Leaf and a Nissan Altima both die around that
timeframe..]
Interesting. Maybe it has something to do with the quality of the battery, the
climate where you live, or how often you use the vehicle?
Our 2013 Leaf and 2014 Prius Plug-in still have their original 12v batteries.
The original 12v battery in our 2001 Prius didn't get replaced until 2012, and
the replacement is still working. My 2010 Chevy Colorado pickup had the battery
replaced in 2018, and is still running on the replacement.
The Leaf is a daily driver. The two Prius aren't driven often, but both have
roughly 1 foot square PV panels to charge them so the battery doesn't go dead
from sitting. Since the pickup is rarely driven, I have a Battery Tender on it
to keep it charged.
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