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Re: Leaf dead - no power of any kind

Posted: Mon Apr 19, 2021 2:01 am
by donaldus
After reading how infrequently the Leaf pushes power to the 12 volt battery, I’ve adopted a rule to connect a 10 amp charger to the battery as the Leaf is connected to our Chargepoint home unit. I have been surprised at how long it takes for the charger to top off the battery. Doesn’t seem the software looks at the 12 volt as being a priority. Nissan should have included a trickle charge connector for the 12 volt battery. Have to open the hood, then the connector “mini-hood” due to interference. I keep a trickle charger on my bike via a connector that attaches to the battery and sticks out from the seat. Going to see if Battery Tender makes a connector with a long cable that would be usable next to the main port.

Re: Leaf dead - no power of any kind

Posted: Mon Apr 19, 2021 3:21 am
by LeftieBiker
Many of us have used an SAE connector hardwired to the 12 volt battery and negative ground, run through a hole in the plastic panel by the QC port, terminating in the charge port compartment. That makes it easy to connect both cables at once.

Re: Leaf dead - no power of any kind

Posted: Mon Apr 19, 2021 4:11 am
by knightmb
There is always the 12V Lithium Auto battery replacement :D

Re: Leaf dead - no power of any kind

Posted: Mon Apr 19, 2021 6:43 am
by Stanton
knightmb wrote:
Mon Apr 19, 2021 4:11 am
There is always the 12V Lithium Auto battery replacement :D
Worked for me! viewtopic.php?f=37&t=11999

Re: Leaf dead - no power of any kind

Posted: Mon Apr 19, 2021 10:09 am
by knightmb
Stanton wrote:
Mon Apr 19, 2021 6:43 am
knightmb wrote:
Mon Apr 19, 2021 4:11 am
There is always the 12V Lithium Auto battery replacement :D
Worked for me! viewtopic.php?f=37&t=11999
*Fist Bump* - Changed mine in 2015, gave away my 12V Lead Acid in 2016 (on this forum!), still on my original one from 2015, even transferred it from my sold 2013 to my current 2020, wasn't going to back to Lead after that. :D

Re: Leaf dead - no power of any kind

Posted: Wed Apr 21, 2021 1:37 am
by donaldus
knightmb...since the Leaf doesn’t use the 12v battery to “crank”, what lithium ion, lithium iron phosphate battery would be a candidate to replace a 2018 SV’s 12v?

Re: Leaf dead - no power of any kind

Posted: Wed Apr 21, 2021 2:20 am
by alozzy
donaldus wrote:
Wed Apr 21, 2021 1:37 am
knightmb...since the Leaf doesn’t use the 12v battery to “crank”, what lithium ion, lithium iron phosphate battery would be a candidate to replace a 2018 SV’s 12v?
Unless you are having a problem with your 12V supply, why change to a much more expensive lithium battery right now? Low voltage issues occur mostly with older LEAFs, it's unlikely that a 2018 like yours would have a worn out 12v lead acid battery already.

Re: Leaf dead - no power of any kind

Posted: Wed Apr 21, 2021 4:52 am
by LeftieBiker
donaldus wrote:
Wed Apr 21, 2021 1:37 am
knightmb...since the Leaf doesn’t use the 12v battery to “crank”, what lithium ion, lithium iron phosphate battery would be a candidate to replace a 2018 SV’s 12v?
A 12 volt AGM battery would work about as well, for half the cost or less.

Re: Leaf dead - no power of any kind

Posted: Wed Apr 21, 2021 7:45 am
by knightmb
donaldus wrote:
Wed Apr 21, 2021 1:37 am
knightmb...since the Leaf doesn’t use the 12v battery to “crank”, what lithium ion, lithium iron phosphate battery would be a candidate to replace a 2018 SV’s 12v?
This is what I used in mine: https://www.amazon.com/StarkPower-SP-12 ... op?ie=UTF8

I choose it because it had a BMS and it was a drop in replacement for a Lead. The difference was, it was only 20AH and the Lead was *suppose* to be 30AH-ish I believe, don't remember exactly. The battery was physical smaller, lighter, kind of an unknown for me at the time, and expensive. It was $250 back in 2015, today they are half the price or less for the same type of battery. It wasn't a "cranking" battery, it was a long term storage battery, so it seemed perfect for the Leaf. Last I remember; only takes 200 watts of power to turn on Leaf for a second, might be different on the 2020, but still seems to work.

Re: Leaf dead - no power of any kind

Posted: Wed Apr 21, 2021 7:50 am
by knightmb
alozzy wrote:
Wed Apr 21, 2021 2:20 am
Unless you are having a problem with your 12V supply, why change to a much more expensive lithium battery right now? Low voltage issues occur mostly with older LEAFs, it's unlikely that a 2018 like yours would have a worn out 12v lead acid battery already.
It might be fixed in the Gen 2 models, but after having the reliable Lithium all those years and all the single digit temperatures it has worked through, why fix what isn't broken? :D
It's cleaner, no acid, smaller, lighter, etc. I leave my Bluetooth dongle plugged in 24/7/365 and never had a depleted battery in any cold morning. It has worked so well that I've changed most of my friends and relatives with Gen 1 to this battery (or one like it) if they wanted to front the cost and not worry about the Lead they have dying in a few years on a cold morning.