Posts: 2485
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Removing 12v battery to charge Leaf

Tue Jun 23, 2020 8:40 pm

Consider installing one of these to monitor your 12V battery; https://antigravitybatteries.com/produc ... lead-acid/

I can periodically check my Leaf's, parked on the street about 25' away, battery voltage & state of charge from my house.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

Posts: 16165
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Removing 12v battery to charge Leaf

Tue Jun 23, 2020 9:59 pm

That looks like a great way to monitor the Leaf's battery. The car could then be run before the voltage gets too low, leaving the current sensor off could speed charging, leading to a tolerable workaround...
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.

Posts: 1027
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: Removing 12v battery to charge Leaf

Wed Jun 24, 2020 6:48 am

I got a new battery(Varta lead acid) fitted but two days later I had the same braking problem.
With 100% certainty it is NOT THE battery.
2016 Leaf doesn't have that many 12V battery degradation problems. Plus you had new battery.
It appears that electro-hydraulic brake is not working correctly.
This can also ruin 12V battery as brake booster can wake up the car when it is asleep. That will drain battery.
12.2V is absolutely OK for vehicle start.

Pulsation while driving suggest ABS sensor failure. But brake pedal going down while stationary seems to be booster failure.

Anyway, this should be fixed under warranty. It is not battery issue.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

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