User avatar
Stanton
Posts: 1957
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Plano, TX
Contact: Website Twitter

Re: Interest In A 12V Battery Upgrade Kit??

Fri Nov 17, 2017 10:02 am

Nubo wrote:Sure, you can intervene and spend time charging the battery separately from the vehicle, or disconnect it before parking for more than a day or two... Examining its voltage constantly; doing load tests... But if you just want to be able to drive without playing nursemaid to a 12V battery, a deep-cycle is a useful alternative.


...or just replace it with a LiFePO4 battery and forget about it! If capacity is a concern, there are higher Ahr alternatives available (I use 20 AHr https://www.lithiumpros.com/product/lit ... n-battery/)...for more $.
Last edited by Stanton on Fri Nov 17, 2017 4:12 pm, edited 1 time in total.
2011 Blue Ocean SV w/floor mats & window tint
12v LiFePO4 battery & FIAMM 74100 horns
Wet Okole seat covers (front)
Tor's low-power heater mod
2013 sun visor
3G modem upgrade
L2 EVSE Upgrade
Battery Pack replaced (Rev E) @51 months and 41k miles

User avatar
Nubo
Posts: 4509
Joined: Fri May 28, 2010 11:01 am
Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Interest In A 12V Battery Upgrade Kit??

Fri Nov 17, 2017 10:56 am

Stanton wrote:
Nubo wrote:Sure, you can intervene and spend time charging the battery separately from the vehicle, or disconnect it before parking for more than a day or two... Examining its voltage constantly; doing load tests... But if you just want to be able to drive without playing nursemaid to a 12V battery, a deep-cycle is a useful alternative.


...or just replace it with a LiFePO4 battery and forget about it! If capacity is a concern, there are higher Ahr alternatives available (I use 20 AHr)...for more $.


I'd consider 20AH to be a viable capacity in a Li replacement, but I'm not willing to spend $800 for it. At $300 I might bite. One does also have to be careful, there are a lot of fly-by-night characters in that market niche. I'd wait until it's not so much like the Wild West. Or, build a pack of my own. 40AH LiFePo cells can be had for about $60 each. I built 8 of them into a pack for my electric lawnmower and it kicks ass! :mrgreen:
I noticed you're still working with polymers.

GerryAZ
Gold Member
Posts: 1491
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Interest In A 12V Battery Upgrade Kit??

Fri Nov 17, 2017 8:25 pm

powersurge wrote:The answer to this age old question of Leaf 12v batteries has 2 solutions... First, you do not need a L-ion battery, or AGM deep cycle. The 12v does not require any cold cranking power to start a big engine, so the stock one is adequate. If you want an upgrade, get the biggest that fits in the battery tray, or even get a bigger tray, and you can have a good, powerful, Lead Acid batter that can last 10 years, like my car batteries do.

Second, it is not the size or type of battery that is important. Battery problems so not happen suddenly, buy over time when we are not looking. My 3 year old battery is in NEW condition. I know this because I have installed a digital volt meter that tells me the battery voltage at all times when I drive. You can get one reasonable, and install it in the cigarette lighter, or hard wire it. When you see the battery voltage start going down, then you can investigate what your car is doing....


No large starting current draw, but sustained small currents so deep cycle is ideal. Maintenance free AGM is my choice for my "install it and forget it" approach. A high quality conventional battery might last 10 years in your climate, but not mine. OEM batteries in gasoline engine cars typically last 18 months (24 months maximum) here. I once had an aftermarket replacement battery fail after 9 months and the warranty replacement fail 6 months later before I started using AGM replacement batteries. The OEM Nissan batteries in the LEAFs actually do a little better because temperatures under the hood are lower. I got 29 months on the 2011 and 32 months on the 2015.

Don't depend upon a voltmeter plugged in to the power socket to give reliable measurements because the port is only active when the car is on.

The battery store where I buy most of my batteries quit selling lithium ion motorcycle batteries because they had too many failures. I will buy one for one of my motorcycles as a test once they have enough confidence to start selling them again.
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

powersurge
Posts: 768
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Interest In A 12V Battery Upgrade Kit??

Mon Nov 20, 2017 10:25 am

What is this fever that everyone seems to have of being in LOVE with LIPO batteries in the Leaf, and then putting a small puny motorcycle battery to boot???!!!! If those $$$$$ mucho dollars batteries are so good, then why doesn't everyone put one in their car?

User avatar
Stanton
Posts: 1957
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Plano, TX
Contact: Website Twitter

Re: Interest In A 12V Battery Upgrade Kit??

Mon Nov 20, 2017 1:41 pm

powersurge wrote:What is this fever that everyone seems to have of being in LOVE with LIPO batteries in the Leaf, and then putting a small puny motorcycle battery to boot???!!!! If those $$$$$ mucho dollars batteries are so good, then why doesn't everyone put one in their car?


Because an (ICE) car requires a much higher capacity (> 40 AHr) to "start" the car...which would be prohibitively expensive.
In addition, the Leaf (and any EV with similar telematics) has more parasitic current draw than most cars...which can result in discharging the 12v to a point that would "kill" a lead-acid (for good), but not a LiFePO.
2011 Blue Ocean SV w/floor mats & window tint
12v LiFePO4 battery & FIAMM 74100 horns
Wet Okole seat covers (front)
Tor's low-power heater mod
2013 sun visor
3G modem upgrade
L2 EVSE Upgrade
Battery Pack replaced (Rev E) @51 months and 41k miles

Return to “Enhancement / Change Requests”