2013 Leaf - Dead 12-Volt Battery every 2 Weeks

[TonyWilliams]

Out of curiosity I checked my 2012 SL, and it doesn't run the dc/dc converter in accessory mode, or in on mode, only in ready mode.

Yes, and the dash will show a red battery symbol.

[Huminit]

I've also had this happen twice to my 2013 sl.

[RegGuheert]

I've also had this happen twice to my 2013 sl.

Welcome to the forum, Huminit!

Can you please tell us a bit more about your issues? Do you think it could be due to inadvertent double-presses of the On-Off button putting the car into ACC just before you get out?

[Staque]

I've had my 2013 SV for two weeks and I woke up to a dead 12V battery this morning.

My wife or I drove it every day since we got it. On Friday we only drove <10 miles, and it sat all day Saturday. (Plugged in, but not charging.) Then today (Sunday) we found it dead. My "smart" charger said "fault" which means the sensed voltage was less than 10V, so I hooked up my dumb charger and the car immediately started fine.

[sorphin]

I've had my 13 SV for about 2 weeks now too, and have yet to have any battery issues.. Make sure you're not accidentally putting it into accessory mode instead of off is my only guess.. (and that she isn't either).. something has to be draining the battery.

[Staque]

I'm guessing, after searching the forum for "12V", that it was the fact that I left it plugged into the EVSE for 2 days.

Any thread where people mention a problem leaving it plugged in, the phrase "for more than a day" is used.

What is the 12V load when the EVSE is plugged in? I must be close to 1A? (I don't have an ammeter.)

[davewill]

I'm guessing, after searching the forum for "12V", that it was the fact that I left it plugged into the EVSE for 2 days.

Any thread where people mention a problem leaving it plugged in, the phrase "for more than a day" is used.

What is the 12V load when the EVSE is plugged in? I must be close to 1A? (I don't have an ammeter.)

That shouldn't do it. I wouldn't expect an issue unless the car had been left plugged in for 2-4 weeks, not 2 days. There's something wrong.

[lpickup]

Out of curiosity I checked my 2012 SL, and it doesn't run the dc/dc converter in accessory mode, or in on mode, only in ready mode.

Well now I have to share a story.

I was at a hockey game about a month ago. I had the car in ON mode playing music as we tailgated. I thought I turned it off when we left, but maybe I didn't. My wife left her purse (with a fob in it) in the trunk (BTW, I am not condoning this practice! I'm against it!).

When we came out a couple hours later, I notice the car's headlights and taillights are on (I keep the lights on AUTO so obviously when it got dark while we were inside, the lights came on), the dash is on (I'm pretty sure it was in ON though and not READY), and the third blue dash LED is lit (I'd never seen that one lit before so I looked up in the manual what that meant, and it meant the 12V battery was charging).

I suppose it is possible that my recollection is not good, but I'm pretty sure the car was not in READY, but rather just ON.

[DaveinOlyWA]

I'm guessing, after searching the forum for "12V", that it was the fact that I left it plugged into the EVSE for 2 days.

Any thread where people mention a problem leaving it plugged in, the phrase "for more than a day" is used.

What is the 12V load when the EVSE is plugged in? I must be close to 1A? (I don't have an ammeter.)

That shouldn't do it. I wouldn't expect an issue unless the car had been left plugged in for 2-4 weeks, not 2 days. There's something wrong.

actually can take as little as 3-5 days. but a new battery should last 2 days easily. it takes time for the LEAF "charging" system to wear the battery down

[sorphin]

Out of curiosity I checked my 2012 SL, and it doesn't run the dc/dc converter in accessory mode, or in on mode, only in ready mode.

Well now I have to share a story.

I was at a hockey game about a month ago. I had the car in ON mode playing music as we tailgated. I thought I turned it off when we left, but maybe I didn't. My wife left her purse (with a fob in it) in the trunk (BTW, I am not condoning this practice! I'm against it!).

When we came out a couple hours later, I notice the car's headlights and taillights are on (I keep the lights on AUTO so obviously when it got dark while we were inside, the lights came on), the dash is on (I'm pretty sure it was in ON though and not READY), and the third blue dash LED is lit (I'd never seen that one lit before so I looked up in the manual what that meant, and it meant the 12V battery was charging).

I suppose it is possible that my recollection is not good, but I'm pretty sure the car was not in READY, but rather just ON.

Being in 'On' does the same thing as being 'in Ready" (it's like being in 'ignition mode' on an ICE, but not starting the engine..) the computer and everything else are still sitting there running... the blue light was on because the DC to DC converter was recharging the 12v battery so it didn't die.