baustin
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Re: Replaced my LEAF 12v battery after 4 years

Sat Nov 11, 2017 4:16 pm

I replaced my original battery with a Bosch AGM Plus with 4 year warranty from Pep Boys. They run periodic discounts/sales. I ordered online and paid in store for about $135 with free installation. I had originally planned to put in an Optima Yellow Top, but even with the discount it was more money with only a three year warranty. When I first decided on the Optima, they were about $150 from Amazon, but when It came time to get one, they were over $200. The Bosch has been in about 6 week with no issues, and no TCU resets needed since installing it.
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GerryAZ
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 1:46 am

baustin wrote:I replaced my original battery with a Bosch AGM Plus with 4 year warranty from Pep Boys. They run periodic discounts/sales. I ordered online and paid in store for about $135 with free installation. I had originally planned to put in an Optima Yellow Top, but even with the discount it was more money with only a three year warranty. When I first decided on the Optima, they were about $150 from Amazon, but when It came time to get one, they were over $200. The Bosch has been in about 6 week with no issues, and no TCU resets needed since installing it.


I took advantage of the Pep Boys sale, but chose the Yellow Top Optima because the salesman was concerned that the Bosch AGM Plus was not listed in their online fitment guide for the 2015 LEAF. Sale prices were almost the same, but Bosch has 4-year while Optima has 3-year full replacement warranty. I have been using Optimas in other vehicles for many years, but this might be the first one I have purchased that was made in Mexico. So far so good, but it will be a year or two before I know if the quality is up to previous levels.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
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Stanton
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 7:39 am

jjeff wrote:Stanton, do you have a current link to your post about your battery experience? Looks like all the Li batteries I found have a screw top, how did you adapt that to the round automotive type post found on our Leafs?
I was thinking of a yellow top Optima but at over $200 on Amazon and people here saying they aren't what they used to be, well I thought my money might be better spent on something else :)


Unfortunately, I had to take down my blog due to excessive spam :(
However, here's a link to the MNL forum topic that generated a lot of discussion http://www.mynissanleaf.com/viewtopic.php?f=37&t=11999
There's a real paradigm shift that happens when you talk about 12v starter batteries in EV's vs. ICE (other than they have to fit the same charging profile); I honestly expect my (current) 12v LiFePO4 battery to last the life of my Leaf (I'm on my second traction battery pack, so that could easily be 10 years).
That's another way of saying: your top consideration can't be cost (you will never find a good Lithium 12v battery for the $ you mention above).
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jjeff
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 9:59 am

Stanton wrote:
jjeff wrote:Stanton, do you have a current link to your post about your battery experience? Looks like all the Li batteries I found have a screw top, how did you adapt that to the round automotive type post found on our Leafs?
I was thinking of a yellow top Optima but at over $200 on Amazon and people here saying they aren't what they used to be, well I thought my money might be better spent on something else :)


Unfortunately, I had to take down my blog due to excessive spam :(
However, here's a link to the MNL forum topic that generated a lot of discussion http://www.mynissanleaf.com/viewtopic.php?f=37&t=11999
There's a real paradigm shift that happens when you talk about 12v starter batteries in EV's vs. ICE (other than they have to fit the same charging profile); I honestly expect my (current) 12v LiFePO4 battery to last the life of my Leaf (I'm on my second traction battery pack, so that could easily be 10 years).
That's another way of saying: your top consideration can't be cost (you will never find a good Lithium 12v battery for the $ you mention above).

Thanks, yes I found your thread after posting. I have to say at first I was considering one of those ~$200 Li batts from Amazon but after reading your thread I decided against it, just too low a Ah capacity. The cost of a decent sized 12v Li batt is just more than I can justify so I think I'll just go with a Pb gel cell, either the overpriced yellow top Optima(currently ~$225) or maybe a cheaper option like the Bosch or maybe something else like the Excide. It will probably end up being the Optima due to the fact I've used them in the past and had good luck and they are also easily available from places I shop :)
I did enjoy reading your thread though and all the reasons to go one way or the other, of course I could also probably just go with a OEM type of Pb acid battery but even those aren't as cheap as they used to be, no more $39 12v Champion batteries to be found.....
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GerryAZ
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 2:16 pm

Jjeff,

Just so we don't confuse anyone, the Bosch and Optima are both AGM batteries (not gel cells). I don't think there are any major manufacturers selling gel batteries for automotive use. Some motorcycle manufacturers supplied true gel cell batteries in new bikes 10-15 years ago, but they were not reliable. The gel battery would be unable to start the engine if it was not well charged because the gel electrolyte becomes stratified (after cold start and short trip, for example), but would be fine after sustained charging.

Gel cells are better suited to low current standby use like small security systems where they are normally kept on float charge for extended time and rarely need to supply current. Gel cells typically need higher float voltages than conventional lead acid flooded or AGM batteries. The relatively low float voltage of the DC-DC converter in the LEAF is ideal for AGM and OK for flooded batteries, but would likely not keep a gel battery adequately charged.

I am sure either the Bosch or Optima AGM battery will work out well for you.
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

jjeff
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 3:10 pm

GerryAZ wrote:Jjeff,

Just so we don't confuse anyone, the Bosch and Optima are both AGM batteries (not gel cells). I don't think there are any major manufacturers selling gel batteries for automotive use. Some motorcycle manufacturers supplied true gel cell batteries in new bikes 10-15 years ago, but they were not reliable. The gel battery would be unable to start the engine if it was not well charged because the gel electrolyte becomes stratified (after cold start and short trip, for example), but would be fine after sustained charging.

Gel cells are better suited to low current standby use like small security systems where they are normally kept on float charge for extended time and rarely need to supply current. Gel cells typically need higher float voltages than conventional lead acid flooded or AGM batteries. The relatively low float voltage of the DC-DC converter in the LEAF is ideal for AGM and OK for flooded batteries, but would likely not keep a gel battery adequately charged.

I am sure either the Bosch or Optima AGM battery will work out well for you.

Thanks for the explanation. I've used gel cell batteries for years, mostly in security and fire alarm applications where they are constantly charged just waiting for a power outage, they can also be used in all positions(don't have a liquid acid like the AGMs) so I just figured the AGM batteries where larger versions of the little 6ah 12v gel cells I've used, sounds like not.
I went looking for a replacement 12v battery today at a local "farm" type store. They had a couple different brands of AGM batteries but not in the 51R size, the only battery in the 51R size was a flooded lead acid for $115. I passed and will check at a couple other local stores for an AGM and if they are too expensive locally I'll probably just go the Optima route from Amazon. Several years back I replaced the 12v battery in our Prius with a yellow top Optima from Amazon and it's worked flawlessly ever since. The Prius originally used a flooded lead acid but as it was mounted in the passenger compartment was a special battery with a vent tube that ran underneath the car to vent any acid fumes. The replacement AGM didn't have to be vented which made it an ideal replacement for the Prius. Of course, our Leafs wouldn't have to be remotely vented but I'd still prefer a battery that didn't produce acid fumes when charged.
2012 SL purchased used 2/'16
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Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a

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Nubo
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 3:49 pm

jjeff wrote:...I went looking for a replacement 12v battery today at a local "farm" type store. They had a couple different brands of AGM batteries but not in the 51R size, the only battery in the 51R size was a flooded lead acid for $115. I passed and will check at a couple other local stores for an AGM and if they are too expensive locally I'll probably just go the Optima route from Amazon. ...


Speaking of "farm stores", it seems to me the "Rural King" AGM 51R may be the same battery as the Bosch AGM Platinum, but a cheaper price, the tradeoff being a lesser warranty. https://www.ruralking.com/battery-auto- ... gm51r.html
I noticed you're still working with polymers.

baustin
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Re: Replaced my LEAF 12v battery after 4 years

Sun Nov 12, 2017 6:53 pm

If you have a Pep Boys in your area, the Bosch 51R 4 year AGM is currently on sale for $133.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

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