Newporttom
Posts: 83
Joined: Tue Jan 04, 2011 9:57 pm
Delivery Date: 17 Dec 2011
Leaf Number: 6194
Location: Saint Johns, FL

Re: Replaced my LEAF 12v battery after 4 years

Fri Dec 04, 2015 3:26 pm

Went to dealer and they checked battery before selling me the new one and they said I didn't need one. Battery Health good, CCA 323. Only issue they saw was 12.38 v reading.

Car is 4 years old. 50K miles. New traction battery 1 month ago. Morning of the check it finished 100% at 6;30. I them drove it to dealer 10 miles away at 1 PM. Radio and driver seat heat on low were on.

There suggestion was to check again in 3 months. Any thoughts?
2012 Nissan Leaf SL - Cayenne Red
Accepted 12/14/11

TimLee
Posts: 2810
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Replaced my LEAF 12v battery after 4 years

Sat Dec 05, 2015 8:07 am

powersurge wrote:... but I would welcome any comments....

Well, you have only been driving a LEAF for about a year.
Only joined MNL October 2015.

Years of experience with ICE vehicle 12V batteries doesn't translate into detailed knowledge of LEAF 12V issues.

But the 12V battery maintaining practices do translate to the LEAF.

But for some peoples driving patterns and usage and with the LEAF 12V charging algorithm, it needs to be done much more regularly.
Some have gone nearly five years doing nothing.
But for many weekly or monthly trickle charging may be needed to get five plus years on a LEAF 12V battery.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

TimLee
Posts: 2810
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Replaced my LEAF 12v battery after 4 years

Sat Dec 05, 2015 8:13 am

Newporttom wrote:Went to dealer and they checked battery before selling me the new one and they said I didn't need one. Battery Health good, CCA 323. Only issue they saw was 12.38 v reading.

Car is 4 years old. 50K miles. New traction battery 1 month ago. Morning of the check it finished 100% at 6;30. I them drove it to dealer 10 miles away at 1 PM. Radio and driver seat heat on low were on.

There suggestion was to check again in 3 months. Any thoughts?

You never provided much information on why you thought you needed a new 12V battery :?:
Why do you think you need one :?:
Did you discuss that in another topic :?:

I would be more confident in the dealer if their battery test gave you an estimate of 12V capacity rather than CCA.
But possible the 12V is OK.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

User avatar
RegGuheert
Posts: 5421
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Replaced my LEAF 12v battery after 4 years

Sat Dec 05, 2015 10:08 am

powersurge wrote:I am surprised that so many people are so worried about what battery to put into their Leafs... Seems like some will even chuck a perfectly good battery to get that "special" battery. I have been driving and fixing my own cars for 40 years, and can tell you that the need to get that "best" battery is over with the Leaf.
I agree with that.
powersurge wrote:If the Leaf has been designed correctly, it will recharge the 12v battery from the main batteries at an acceptable rate.
As LeftieBiker said, that's a big "if". The charging system in the LEAF has all of the capability to properly maintain the battery, but the programming is lacking. As you say, the demands on the LEAF's battery are minimal. As such, we should see superior battery life to normal ICE chargers. Unfortunately, many have failed after only two years.
powersurge wrote:The only real consumer issue is to maintain the battery fully charge all through the year.
Exactly! Unfortunately, with the built-in charger, for many applications the LEAF battery will spend its life at about 60% SOC if not attended to by its owner.
powersurge wrote:I have had my car batteries last 8-10 years on my CAR batteries, which test the power of the battery a lot more.
Eight years is normal for my vehicles, too. But frankly, most of my other vehicles require NO additional effort on my part to achieve this amount of battery life.
powersurge wrote:Get a good, cheap battery from Costco or Walmart.
That's where I get mine. Recently Costco has offered the best combination of cost/warranty. About $73 for a LEAF-suitable battery with a great warranty.
powersurge wrote:To keep your battery in top shape, I suggest the following:

Wire this solar battery charger to the car and place it with double sided sticky tape on the dashboard. It will keep the battery at 100% even after MONTHS of car non-use. I have 4 cars, and always get them to start.

http://www.harborfreight.com/15-watt-so ... 68692.html
My LEAF already has a built-in PV module to maintain the 12V battery. It is insufficient to do the job, however, since the car is usually parked in the garage.
powersurge wrote:Another way to keep the battery charged is to connect a "Battery Tender" charger to the battery every few weeks.
That's the best advice for a LEAF owner, IMO.
powersurge wrote:Every 6 months, to keep your peace of mind that your battery is still "strong" and holds a good charge (e.g., your battery is still good), use the battery meter below. It will put an electrical load on the battery and tell you if the battery itself is "good".

http://www.harborfreight.com/automotive ... -9193.html

Someday, after 6-8 years (or even 10 years in my experience), it will give your a "weak" reading, and then you go to Walmart or Costco and get another cheap battery.
Also good advice. Another simple test is to simply let your LEAF sit for a day with the hood up after a full trickle charge (don't open the doors during this period). If the voltage is below 12V after one day, then you are in serious need of a new battery.
powersurge wrote:This has worked for me over the years, but I would welcome any comments....
Very good advice! Thanks!
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

Newporttom
Posts: 83
Joined: Tue Jan 04, 2011 9:57 pm
Delivery Date: 17 Dec 2011
Leaf Number: 6194
Location: Saint Johns, FL

Re: Replaced my LEAF 12v battery after 4 years

Sat Dec 05, 2015 9:58 pm

TimLee wrote:
Newporttom wrote:Went to dealer and they checked battery before selling me the new one and they said I didn't need one. Battery Health good, CCA 323. Only issue they saw was 12.38 v reading.

Car is 4 years old. 50K miles. New traction battery 1 month ago. Morning of the check it finished 100% at 6;30. I them drove it to dealer 10 miles away at 1 PM. Radio and driver seat heat on low were on.

There suggestion was to check again in 3 months. Any thoughts?

You never provided much information on why you thought you needed a new 12V battery :?:
Why do you think you need one :?:
Did you discuss that in another topic :?:

I would be more confident in the dealer if their battery test gave you an estimate of 12V capacity rather than CCA.
But possible the 12V is OK.


The only reason I was going to replace the battery was because the car was 4 years old. I've had no issues. Here's the printout if it helps any.

Image
2012 Nissan Leaf SL - Cayenne Red
Accepted 12/14/11

User avatar
RegGuheert
Posts: 5421
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Replaced my LEAF 12v battery after 4 years

Sun Dec 06, 2015 3:30 am

Newporttom wrote:The only reason I was going to replace the battery was because the car was 4 years old. I've had no issues. Here's the printout if it helps any.
It seems you have the typical LEAF 12V battery: "Needs charge". 12.38V is close to what I typically see when I open the hood of our LEAF, let it sit for a couple of hours and then take a reading. On other vehicles we own, I see 12.6V or above.

Simply put, that's what "charging" at 13.1V gets us. Nissan needs to reprogram the LEAF 12V battery charger to spend more time in the absorption phase (~14.5V).
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

GerryAZ
Gold Member
Posts: 1247
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Replaced my LEAF 12v battery after 4 years

Sun Dec 06, 2015 4:34 am

RegGuheert wrote:Nissan needs to reprogram the LEAF 12V battery charger to spend more time in the absorption phase (~14.5V).


Nissan has changed the charging profile. My 2011 would switch to float when the absorption current dropped below about 10 amperes. The 2015 keeps charging at ~14.5V until the absorption current drops below about 5 amperes.

Gerry
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

User avatar
RegGuheert
Posts: 5421
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Replaced my LEAF 12v battery after 4 years

Sun Dec 06, 2015 6:47 am

GerryAZ wrote:Nissan has changed the charging profile. My 2011 would switch to float when the absorption current dropped below about 10 amperes. The 2015 keeps charging at ~14.5V until the absorption current drops below about 5 amperes.
Thanks! That's good to hear!

Do you find that your 2015 keeps the 12V battery fully charged?
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

TimLee
Posts: 2810
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Replaced my LEAF 12v battery after 4 years

Sun Dec 06, 2015 6:51 am

Newporttom wrote:... The only reason I was going to replace the battery was because the car was 4 years old. I've had no issues. Here's the printout if it helps any.
...

I don't know which 12V battery tester they are using, but it is pretty lacking in clear information.

Not sure how they are defining State of Health.

But at just a bit above 50% that doesn't seem too great, but may be normal for a four year old battery.

As others said, with the charge being low would be smart to trickle charge monthly or every couple weeks.

You might get a couple more years out of it.
But if you don't do that and it being four years old State of Health of 50% your chances are quickly increasing that at some point it will fail to start or you might experience some of the scary likely low 12V battery voltage caused issues.
Such as no or really poor braking.
Or vehicle shutdown while driving.

Better to avoid that.

If it was me, I would get a free battery test at a couple car parts places and see what they say compared to the dealer.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

GerryAZ
Gold Member
Posts: 1247
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Replaced my LEAF 12v battery after 4 years

Sun Dec 06, 2015 9:54 am

RegGuheert wrote:
GerryAZ wrote:Nissan has changed the charging profile. My 2011 would switch to float when the absorption current dropped below about 10 amperes. The 2015 keeps charging at ~14.5V until the absorption current drops below about 5 amperes.
Thanks! That's good to hear!

Do you find that your 2015 keeps the 12V battery fully charged?


With my driving and charging pattern, both 2015 and 2011 keep (kept) the 12V battery charged. I have never used an external charger to charge a 12V Leaf battery (I must charge batteries in other vehicles since they get little use) in over 65k miles of driving electric. My commute is 52 miles round trip so I typically drive 55 to 75 miles on a charge with evening errands. This means the 12V battery is charged for several hours at night (while charging traction battery) and at least 30 minutes each way commuting in addition to a few short trips. The charging algorithm on the Leaf (either 2011 or 2015) is ideal for my use because it keeps the battery charged and does not cause enough gassing to require frequent addition of distilled water.

I had to replace the 12V battery in the 2011 after about 2-1/2 years (actually better than average life for OEM 12V batteries in Phoenix heat). I inadvertently left the ELM unit connected to the OBDII port and the Kyocera Event running Leaf Spy on the passenger seat when I parked at the office for a business trip. The combination of Leaf Spy keeping the CAN bus active (probably interfered with the automatic 12V charging every 5 days while parked) and the power draw of the ELM unit completely discharged the 12V battery by the time I returned after 6 days. I jump-started the Leaf from my office vehicle and drove home. The 12V battery was recharged by the time I got home, but it failed about a month later. I am sure it would have lasted longer if it had not been completely discharged.

Gerry
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

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