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Re: 12 Volt Lead Acid Battery Replacement

Posted: Sun Jan 22, 2017 8:49 pm
by IssacZachary
Stanton wrote:If you really want to "get the lead out" for the 12v battery, why don't you just replace it with a LiFePO4 made for that purpose (BMS included)? There's a whole thread on it http://www.mynissanleaf.com/viewtopic.php?f=37&t=11999
Thanks! I'll take a look at it. The fear I have is what would happen with a LiFePO4 battery at -40*F/-40*C?

Edit: Doing a little reading at that thread you posted and it looks like a LiFePO4 battery gives only 10% of its usable power at -40*F. So if it's a 40Ah battery, it then becomes a 4Ah battery in a worse case scenario. That's better than a 500F ultra capacitor pack (0.5Ah from 13V to 9V.)

Re: 12 Volt Lead Acid Battery Replacement

Posted: Wed Jan 25, 2017 5:48 am
by arnis
IssacZachary wrote:Any suggestions for a good battery replacement for Colorado high mountains where -40*F/-40*C temperatures can occur?

I was thinking the Winston 90ah battery. It's rated to -45*C charge and discharge.

Or a capacitor pack made from 6 3,000F ultra capacitors made by Maxwell's Boostcap. Those are rated to -40*F/-40*C.
Leaf keeps voltage in 14.5V mode below +3C. Including preheat, including driving, including charging.
Just normal lead acid battery will work if Leaf is used at least every other day. Keeping at 14.5V for
hours during charging is good enough.

Your Leaf should have traction battery heater. Do you have LeafSpy? Do you have reading of HV battery temperature while 2, 1 or 0 bars?

Do NOT install Lithium battery! Not possible to recharge safely at -25C or below.

Re: 12 Volt Lead Acid Battery Replacement

Posted: Wed Jan 25, 2017 8:09 am
by IssacZachary
arnis wrote:Leaf keeps voltage in 14.5V mode below +3C. Including preheat, including driving, including charging.
Just normal lead acid battery will work if Leaf is used at least every other day. Keeping at 14.5V for
hours during charging is good enough.

Your Leaf should have traction battery heater. Do you have LeafSpy? Do you have reading of HV battery temperature while 2, 1 or 0 bars?

Do NOT install Lithium battery! Not possible to recharge safely at -25C or below.
Thanks!

I'm wanting to get LeafSpy but I'm not sure what all I need to get it. I asked about it in the LeafSpy Thread Here but haven't gotten any answers. I'm guessing I need a different phone and some sort of thing that goes in the OBD 2 plug.

Re: 12 Volt Lead Acid Battery Replacement

Posted: Wed Jan 25, 2017 9:24 am
by arnis
IssacZachary wrote:
arnis wrote:Leaf keeps voltage in 14.5V mode below +3C. Including preheat, including driving, including charging.
Just normal lead acid battery will work if Leaf is used at least every other day. Keeping at 14.5V for
hours during charging is good enough.

Your Leaf should have traction battery heater. Do you have LeafSpy? Do you have reading of HV battery temperature while 2, 1 or 0 bars?

Do NOT install Lithium battery! Not possible to recharge safely at -25C or below.
Thanks!

I'm wanting to get LeafSpy but I'm not sure what all I need to get it. I asked about it in the LeafSpy Thread Here but haven't gotten any answers. I'm guessing I need a different phone and some sort of thing that goes in the OBD 2 plug.

http://www.ebay.com/itm/Super-Mini-OBD2 ... 66&vxp=mtr

80% chance that this will do the trick.
You need just any android phone that has Bluetooth, nothing else. Pretty much every single smartphone works.
Even the 99$ special offer phones.
And tablets also work. If you have one.

Re: 12 Volt Lead Acid Battery Replacement

Posted: Wed Jan 25, 2017 10:52 am
by IssacZachary
arnis wrote:
IssacZachary wrote:
arnis wrote:Leaf keeps voltage in 14.5V mode below +3C. Including preheat, including driving, including charging.
Just normal lead acid battery will work if Leaf is used at least every other day. Keeping at 14.5V for
hours during charging is good enough.

Your Leaf should have traction battery heater. Do you have LeafSpy? Do you have reading of HV battery temperature while 2, 1 or 0 bars?

Do NOT install Lithium battery! Not possible to recharge safely at -25C or below.
Thanks!

I'm wanting to get LeafSpy but I'm not sure what all I need to get it. I asked about it in the LeafSpy Thread Here but haven't gotten any answers. I'm guessing I need a different phone and some sort of thing that goes in the OBD 2 plug.

http://www.ebay.com/itm/Super-Mini-OBD2 ... 66&vxp=mtr

80% chance that this will do the trick.
You need just any android phone that has Bluetooth, nothing else. Pretty much every single smartphone works.
Even the 99$ special offer phones.
And tablets also work. If you have one.
Thanks! You wouldn't happen to know if there's a LeafSpy app for Windows? If not and if I can't get it to work on an Android emulator on my Windows tablet I'll look into a used Android phone or tablet.

Re: 12 Volt Lead Acid Battery Replacement

Posted: Wed Jan 25, 2017 2:05 pm
by LeftieBiker
I got a Kyocera Event, new old stock, for $30. That's one of the phones that works with the correct android BT OBDII reader. At that price, just leave it in the glove compartment, with a few games added for killing time at charging stations.

Re: 12 Volt Lead Acid Battery Replacement

Posted: Wed Jan 25, 2017 5:24 pm
by IssacZachary
LeftieBiker wrote:I got a Kyocera Event, new old stock, for $30. That's one of the phones that works with the correct android BT OBDII reader. At that price, just leave it in the glove compartment, with a few games added for killing time at charging stations.
Thanks!

Re: 12 Volt Lead Acid Battery Replacement

Posted: Thu Jan 26, 2017 12:11 am
by LeftieBiker
Remember that you don't have to activate it. Just use it in Airplane Mode with the WiFi on if you have WiFi access, and it's a decent little almost-free smartphone.

Re: 12 Volt Lead Acid Battery Replacement

Posted: Sat Dec 09, 2017 8:33 am
by RScottyL
Not sure it has been mentioned, but you could always go with an Optima YellowTop battery:

https://www.optimabatteries.com/en-us/y ... le-battery

https://www.youtube.com/watch?v=k_EHoLTIIAE&t=4s

Re: 12 Volt Lead Acid Battery Replacement

Posted: Sat Dec 09, 2017 12:34 pm
by LeftieBiker
The Yellowtop has been mentioned a lot. Quality suffered a few years back when production moved to Mexico, but AFAIK they are ok now.