brainy19
Posts: 10
Joined: Sun Jun 23, 2019 12:45 am
Delivery Date: 23 Jun 2019

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 12:29 pm

Everyone,

I went to AutoZone and the worker asked me to disconnect the 12V battery, so the main car battery doesn't mess with the readings. So I did so. When he connected the 12V battery terminals, the tester measured 10.5V before the test even started. So I got a new battery.

alozzy
Posts: 1568
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 2:32 pm

Ask them to charge the new battery before installing it
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

LeftieBiker
Moderator
Posts: 15274
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 2:51 pm

alozzy wrote:
Wed Aug 26, 2020 2:32 pm
Ask them to charge the new battery before installing it
Yup. And if it's too late, either charge it yourself with an external charger/maintainer, or take it for a long drive with the climate control on, but on low. The car won't quickly charge up the battery like an ICE vehicle would.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GerryAZ
Gold Member
Posts: 2589
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 5:31 pm

Just drive the car (or keep it in "Ready" mode while parked) for at least 30 minutes. The 12V battery is charged fairly quickly while driving or while charging the traction battery. It is OK to use an external charger if you have one, but should not be needed because the DC-DC converter will charge at about 14 volts until the current absorbed by the 12V battery drops indicating nearly full charge. It then runs at float voltage of about 13 volts to avoid overcharging the battery while driving or while charging the traction battery. I have never used an external charger--I just let the car charge the replacement battery in the 2011 and again in the 2015 by installing the new battery in the evening and charging the traction battery overnight in each case.
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; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

DougWantsALeaf
Posts: 1970
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 6:22 pm

While I did have to "jump" my 12V (and replace once) on my 13 Leaf, so far so good on the 19s.
2019 S Plus (97.98% SOH) & 2019 SV Plus (94.84% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

brainy19
Posts: 10
Joined: Sun Jun 23, 2019 12:45 am
Delivery Date: 23 Jun 2019

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 6:26 pm

Thanks for the charging advice everyone! It's too late to charge at AutoZone, but I was able to start the car multiple times today no problem, so maybe it was already fully charged?

But either way, I'm in good shape it seems.

LeftieBiker
Moderator
Posts: 15274
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Key fob sometimes worked, sometimes didn't.

Wed Aug 26, 2020 7:03 pm

The current required to start a Leaf is low, so unlike a slowly turning over ICE engine to warn you, you have little or no warning when the Leaf's accessory battery starts to get low. The new battery should have come with at least 80% charge. The point being made is that, Gerry's experiences notwithstanding, some Leafs do not do a great job of charging their accessory batteries.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

WetEV
Posts: 3893
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Key fob sometimes worked, sometimes didn't.

Thu Aug 27, 2020 7:00 am

LeftieBiker wrote:
Wed Aug 26, 2020 7:03 pm
The current required to start a Leaf is low, so unlike a slowly turning over ICE engine to warn you, you have little or no warning when the Leaf's accessory battery starts to get low. The new battery should have come with at least 80% charge. The point being made is that, Gerry's experiences notwithstanding, some Leafs do not do a great job of charging their accessory batteries.
Especially the early years (2011 and 2012).

I've got the original 12V battery in my 2014. Been on external charge exactly once.
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
2019 eTron Blue

Lothsahn
Posts: 654
Joined: Thu Apr 05, 2018 4:35 pm
Delivery Date: 04 Jan 2018
Leaf Number: 007797

Re: Key fob sometimes worked, sometimes didn't.

Thu Aug 27, 2020 8:37 am

WetEV wrote:
Thu Aug 27, 2020 7:00 am
LeftieBiker wrote:
Wed Aug 26, 2020 7:03 pm
The current required to start a Leaf is low, so unlike a slowly turning over ICE engine to warn you, you have little or no warning when the Leaf's accessory battery starts to get low. The new battery should have come with at least 80% charge. The point being made is that, Gerry's experiences notwithstanding, some Leafs do not do a great job of charging their accessory batteries.
Especially the early years (2011 and 2012).

I've got the original 12V battery in my 2014. Been on external charge exactly once.
10.5V is extremely low. That battery is toast if you've been driving the car and it's not charging higher than that.

I have a 2011 and put it on an external maintainer every 2 months just to top it off. There's someone here who posted a graph showing that the early model years slowly let the 12V battery rest to around 50-75% of a full charge, which results in premature wear on the battery. I also have a deep cycle battery to make it more resilient to being stored at partial charge.

I actually installed a 12V hookup where the QC port would be (I don't have QC) so I could easily connect the 12V maintainer to the car. Came in handy during COVID lockdown when I was only driving once a week or less.
2011 Silver SV, purchased 2018, lives in Missouri (previously in CA)
LeafSpy Pro + BAFX Products OBDII dongle
Battery swap 2019/04/24 (87% SOH, 12 bar)

LeftieBiker
Moderator
Posts: 15274
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Key fob sometimes worked, sometimes didn't.

Thu Aug 27, 2020 12:39 pm

Sadly, I'm going to be adding a similar hardwired connection to my 2018. It does a better job of charging the battery than many early Leafs, but I've seen it at about 12.25-12.35 volts a few times.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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