dgpcolorado said:
...Accessory mode is hard on the 12V battery and the LEAF doesn't do a good job in keeping that battery at the proper charge level to begin with.
+10
I am now on third 12V battery in 51 months since last Monday.
First replacement was no cost warranty replacement at 24 months.
Using On mode (no foot on brake, push start button twice) killed it.
In that mode the DC to DC will periodically charge the 12V.
But it lets it sag to 10V which is way to low before it does that.
That replacement died at 27 months, but running it dead three times helped kill it even though I have regularly trickle charged it the past year. Also I usually do not unplug the OBDII bluetooth adapter and they pull a lot.
The prorated replacement under warranty was $48, but the dealer cut me a break and pro-rated the labor too which they were not required to do.
Using accesory is disastrousy bad for the 12V.
Best to keep the car in Ready mode any time you are using 12V. That keeps it floated at 13V.
And even if you do that and routinely trickle charge, the LEAF 12V charging protocol will still quickly destroy the battery.