ByeFO
Gold Member
Posts: 61
Joined: Sat Mar 04, 2017 8:38 am
Delivery Date: 13 Jun 2017
Leaf Number: 407834
Location: Philadelphia area

Re: 12 Volt Lead Acid Battery Replacement

Sun Jan 14, 2018 5:31 pm

Thanks to this forum for saving me money and saving me from wasting time at the dealership .
I got the T/M failure visit dealer message and my Leaf was freaking out when I tried to start it. While waiting for a tow to the dealership I read this topic. I had a car jump starter I got for Christmas and when I hooked it up to the battery, the car started fine.

So instead of towing to the dealer and the subsequent expense and trip to get the car back, I shopped a new battery, I got another lead acid battery, a local brand called Deka on sale for $82. I had trouble finding a matching battery until I found the Deka. The major chains kept trying to sell me a $237 Optima battery. The Deka only has 18mo warranty, I guess I’ll see how long it lasts and if it can handle the demands placed on it by the Leaf.

Thank you Forum!
2013 (4/2013) Pearl White SV LED/QC package
6/13/17: 22,852mi; AHr= 54.13; SOH= 82%

LeftieBiker
Posts: 8647
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12 Volt Lead Acid Battery Replacement

Sun Jan 14, 2018 6:27 pm

Charge the new battery fully with an external charger, and then give it an occasional external charge if the resting voltage is less than 12.6 volts after that. This will extend the battery's life. If the resting voltage stays above 12.5 volts don't worry about it.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

ByeFO
Gold Member
Posts: 61
Joined: Sat Mar 04, 2017 8:38 am
Delivery Date: 13 Jun 2017
Leaf Number: 407834
Location: Philadelphia area

Re: 12 Volt Lead Acid Battery Replacement

Mon Jan 15, 2018 5:39 am

LeftieBiker wrote:Charge the new battery fully with an external charger, and then give it an occasional external charge if the resting voltage is less than 12.6 volts after that. This will extend the battery's life. If the resting voltage stays above 12.5 volts don't worry about it.


Should I check the charge using a multimeter with car off, or can I use the reading from Leaf Spy?

Thanks!
2013 (4/2013) Pearl White SV LED/QC package
6/13/17: 22,852mi; AHr= 54.13; SOH= 82%

LeftieBiker
Posts: 8647
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12 Volt Lead Acid Battery Replacement

Mon Jan 15, 2018 6:04 am

Open the hood (or just unlatch it) then turn the car off, and check the rest voltage with the car having been off and all doors closed, for at least 15 minutes.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Becky50
Gold Member
Posts: 156
Joined: Mon Apr 02, 2012 9:42 pm
Delivery Date: 02 Aug 2012
Leaf Number: 019032
Location: San Jose, CA

Re: 12 Volt Lead Acid Battery Replacement

Thu Jan 18, 2018 9:55 pm

I came back from a 2 week vacation to find that my 12volt battery had died. Called AAA, who tested the battery, advised me to get a new one, and $147 later my 2012 LEAF was good to go once again. After 6 and a half years, I am still loving driving my LEAF.

LeftieBiker
Posts: 8647
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: 12 Volt Lead Acid Battery Replacement

Thu Jan 18, 2018 10:26 pm

I think that 5 years should be the maximum for replacing the 12 volt battery as a matter of course.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

WetEV
Posts: 2039
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: 12 Volt Lead Acid Battery Replacement

Fri Jan 19, 2018 7:50 am

LeftieBiker wrote:I think that 5 years should be the maximum for replacing the 12 volt battery as a matter of course.


Depends on where, just like the traction battery.

Shorter in hot places, longer in cool places.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red

powersurge
Posts: 946
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: 12 Volt Lead Acid Battery Replacement

Fri Jan 19, 2018 8:45 am

You cannot estimate your 12v battery by time. It depends on how it is stressed, and how well it keeps at a full charge.

I recently replaced an ORIGINAL EQUIPMENT battery that was 10 years old!!

User avatar
Nubo
Posts: 4724
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: 12 Volt Lead Acid Battery Replacement

Fri Jan 19, 2018 10:49 am

powersurge wrote:You cannot estimate your 12v battery by time. It depends on how it is stressed, and how well it keeps at a full charge.

I recently replaced an ORIGINAL EQUIPMENT battery that was 10 years old!!



The battery can be measured objectively, but it takes more than a simple voltage measurement. It must be placed under a substantial and calibrated load. Load testers can be had fairly cheap (around $20 for a 100-amp tester). This will tell you the general condition of the battery instead of just measuring the surface charge. ICE vehicles have a built-in "load test" of a sort, in the form of the starter motor. Sluggish starts generally let ICE drivers know when the end is near. With EVs it will sneak up on you unless you load-test periodically.

The other aspect is sudden failure, which can occur in flooded batteries as grid material is shed over time and accumulates on the bottom of the case. Batteries are designed with room at the bottom for this debris to collect, but if/when it gets deep enough to contact the plates that's the end of the battery. So that is an age-related failure mode that is more difficult to predict.
I noticed you're still working with polymers.

powersurge
Posts: 946
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: 12 Volt Lead Acid Battery Replacement

Tue Jan 23, 2018 6:08 am

Nubo wrote:
powersurge wrote:You cannot estimate your 12v battery by time. It depends on how it is stressed, and how well it keeps at a full charge.

I recently replaced an ORIGINAL EQUIPMENT battery that was 10 years old!!



The battery can be measured objectively, but it takes more than a simple voltage measurement. It must be placed under a substantial and calibrated load. Load testers can be had fairly cheap (around $20 for a 100-amp tester). This will tell you the general condition of the battery instead of just measuring the surface charge. ICE vehicles have a built-in "load test" of a sort, in the form of the starter motor. Sluggish starts generally let ICE drivers know when the end is near. With EVs it will sneak up on you unless you load-test periodically.

The other aspect is sudden failure, which can occur in flooded batteries as grid material is shed over time and accumulates on the bottom of the case. Batteries are designed with room at the bottom for this debris to collect, but if/when it gets deep enough to contact the plates that's the end of the battery. So that is an age-related failure mode that is more difficult to predict.


I agree with everything you said..... I said that you cannot estimate a battery's life span by time (years). Yes, I know that the health of the battery is a load test.

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