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Re: 12v battery dies overnight 2013 S

Posted: Fri Apr 21, 2017 6:50 am
by Marktm
npav wrote:I've run into a problem with my 2013 LEAF S. The 12v battery dies overnight, back in November I bought a new 12v battery from AutoZone because the original died and there had been no problems since.

Now a few days ago I go to drive the LEAF and it doesn't start, no lights, no door unlock, nothing, just like when the original battery died. So I figured the 12v was low on charge, so I jump started it and drove around for a while to charge it up.

Next morning it's dead again. So this time I jump it and take it to AutoZone to test the battery, they say it's healthy, just needs a charge, so I plug in the portable Stanley battery charge kit and leave it there for about 3 hours or so. Give it a shot and it starts right up, checked the battery voltage and it shows at just over 13v. Figure that's that and call it a night. Next morning the car won't start again and it registers at just 4v.

Then again this whole thing could just be a bad battery from AutoZone and they don't want to admit it...


npav -
A "new" battery that is installed in a Leaf MAY need to be fully charged before it is put to use. This would be an unusual case where the seller has old inventory (and had installed the acid!) and the battery has discharged. What is important to understand about the Leaf is that the charging system is quite different than a typical ICE auto and (at least I've proven for my 2012 Leaf - cannot comment on other models!), it is better at MAINTAINING the FLA battery than it is charging a discharged battery.

Next, if you buy a oversized auto battery, it can take a very long time to charge from a discharged state to fully charged with a trickle charger. Let's say you have a 100 ahr FLA battery (I know - it's rated in CCA!) and you use a 1.5 amp "trickle" charger to recharge a fully discharged battery- at best it will take about 60 hours to charge! Also, individual cells in a FLA battery like to be "equalized" periodically with a typical full amperage (15+) auto style charger - up to essentially 15 volts for 1/2 to 2 hours - and that assumes it was near full charge to start with.

Lastly, if you've seen 4 volts on your new battery - take it back and insist on a new one. This is a very destructive voltage for any lead acid battery - for any length of time. It is possible the new battery had a "shorted" cell - or some defect that effectively quickly drains itself - with no external connections.

Good luck and let us know how it works out for you.

Re: 12v battery dies overnight 2013 S

Posted: Mon May 01, 2017 4:43 pm
by cliff
LeftieBiker wrote:The power windows only remain active for 30 seconds after power off, though.

I finally got around to checking the service manual, while there is a switched power supply,
there is also a non switched power on pin 18, that manual says observe battery voltage
when power is off. Bottom line, the 30 second power off would not effect this pin for
a failed controller.

Re: 12v battery dies overnight 2013 S

Posted: Sun May 21, 2017 5:56 am
by JRoque
Hi all,

Another possibility: it's the Carwings radio that remain on and retrying to connect to Nissan. I've had my battery drained down twice and both times Carwings was also having issues. Right now, neither the app or website can connect to the car. Maybe it's all coincidence.

JR

Re: 12v battery dies overnight 2013 S

Posted: Sun May 21, 2017 6:07 am
by Stanton
JRoque wrote:Hi all,

Another possibility: it's the Carwings radio that remain on and retrying to connect to Nissan. I've had my battery drained down twice and both times Carwings was also having issues. Right now, neither the app or website can connect to the car. Maybe it's all coincidence.

JR


There have been some problems with CarWings (and the TCU upgrade) draining 12v batteries, but an "S" trim doesn't have CarWings.
The OP has never posted again, so for all we know it was a bad 12v battery to begin with.

Re: 12v battery dies overnight 2013 S

Posted: Thu Oct 12, 2017 9:04 pm
by Neptuneninja0
I have a 2013 S. No OBD2 attachment. I suffered dead 12v after roughly 18 hours of sitting unplugged. The factory 12v battery had spewed sulfuric acid all over the place. I pulled it. Baking soda and a hose handled that. I dropped in an AGM deep cycle battery for $90. problem has not returned. As a bonus, no core charge because I think the battery is supposed to go in a wheelchair.

A question I do have for the collective: Which kinds of devices (cheaper the better) should I acquire and which kinds of symptoms should I watch for? Are there certain behaviors that precede 12v battery death? I would have liked to have seen the original 12v battery coming and headed it off at the pass.

When I bought the damned thing, the next day was a brand new pair of nerd tires. Next time I buy a car, first thing will be replacing any battery that farts acid!

Re: 12v battery dies overnight 2013 S

Posted: Thu Oct 12, 2017 9:45 pm
by LeftieBiker
You can check the rest voltage regularly, with the car off and doors closed. Anything under 12.6 volts is a warning flag. A Battery Tender, Battery Tender JR, or similar "smart" maintainer, used regularly, will top the battery off if needed.

Re: 12v battery dies overnight 2013 S

Posted: Fri Oct 13, 2017 4:56 am
by Neptuneninja0
Do you recommend testing the rest voltage with a DMM? if so, are there brands accurate enough that cost less than Fluke?

Re: 12v battery dies overnight 2013 S

Posted: Fri Oct 13, 2017 3:04 pm
by bbrowncods
I have a 2014 Leaf SL. Bought new. When it was two months old the 12v battery died. Dealer replaced it and did an "update" on the software. No problems for three years. In August I had the 2G to 3G update done. Right after that the 12v battery mysteriously drained down to about 3-4 volts a couple of times.
Nissan did an "update" again and no problems for the last two months. Yesterday it was dead again! Had it towed to the dealer and they could not find anything wrong.
A couple of lessons learned:
1. Nissan knows there is a problem, but have no clue what it is.
2. Make sure nothing is plugged in the cigarette lighter or OBD port. "sometimes aftermarket devices will drain the battery"- quote on my August service report to explain away a problem Nissan knows nothing about.
3. The 12v battery is a 84 month battery (new 30 months ago) that is now marginal based on Nissan's testing todayof the battery. This is due to the several times it has been drained to 3-4 volts.
4. Nissan has nothing else to go on, so the now marginal 12volt battery is the potential problem.
5. After reading this thread, I did realize that I left the drive battery charger plugged into the car for over 24 hours. Could be the culprit.

Anyway, I hope my experience and observations help someone. I'm going to plug in the car tonight and leave it plugged in all weekend as a test.

Re: 12v battery dies overnight 2013 S

Posted: Fri Oct 13, 2017 4:02 pm
by LeftieBiker
Given your situation, the best bandaid for you is a hardwired connection through the charge port compartment for a 2 amp or so battery maintainer. Just plug it in whenever you plug the car in to charge, and unplug it when you unplug the charging cable. That will also allow you to leave the car plugged in but not charging for as long as you like. It's what I use, except my Battery Tender JR is only 0.75 amp.

Re: 12v battery dies overnight 2013 S

Posted: Fri Oct 13, 2017 5:36 pm
by cwerdna
bbrowncods wrote:I have a 2014 Leaf SL. Bought new. When it was two months old the 12v battery died. Dealer replaced it and did an "update" on the software. No problems for three years. In August I had the 2G to 3G update done. Right after that the 12v battery mysteriously drained down to about 3-4 volts a couple of times.
Nissan did an "update" again and no problems for the last two months. Yesterday it was dead again! Had it towed to the dealer and they could not find anything wrong.
A couple of lessons learned:
1. Nissan knows there is a problem, but have no clue what it is.
2. Make sure nothing is plugged in the cigarette lighter or OBD port. "sometimes aftermarket devices will drain the battery"- quote on my August service report to explain away a problem Nissan knows nothing about.
3. The 12v battery is a 84 month battery (new 30 months ago) that is now marginal based on Nissan's testing todayof the battery. This is due to the several times it has been drained to 3-4 volts.
4. Nissan has nothing else to go on, so the now marginal 12volt battery is the potential problem.
5. After reading this thread, I did realize that I left the drive battery charger plugged into the car for over 24 hours. Could be the culprit.

Anyway, I hope my experience and observations help someone. I'm going to plug in the car tonight and leave it plugged in all weekend as a test.

When you keep using the name Nissan, are you talking about the dealer and its service department or Nissan, the company? In most places in the US, state franchise laws prohibit automakers from owning dealers. This makes your post extra confusing.