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Replace small 12v battery to regular one.

Posted: Sun Mar 25, 2018 11:11 am
by Markokk888
Is it possible to replace the nissan leaf original small 12v battery with a bigger capacity one from the petrol or diesel car ?
or the car will somehow struggle with the regular car battery ?

Re: Replace small 12v battery to regular one.

Posted: Sun Mar 25, 2018 1:22 pm
by jjeff
It will work just fine, I ended up with the OEM sized 51R Optima for a replacement but if I were going with a regular lead acid I'd have picked the largest one that would have fit under the hood and between the hold-downs.
Others have gone with a much smaller battery and they seem to work OK too, just not as much as reserve capacity if you accidentally leave something on or park the car for an extended period of time.

Re: Replace small 12v battery to regular one.

Posted: Sun Mar 25, 2018 3:19 pm
by Markokk888
Well thats the point i want to leave something on.

Re: Replace small 12v battery to regular one.

Posted: Sun Mar 25, 2018 3:31 pm
by cwerdna
viewtopic.php?f=9&t=18129&p=439206#p439206 replaced the 12 volt with a larger one meant for a Nissan Rogue.

Re: Replace small 12v battery to regular one.

Posted: Thu Apr 12, 2018 10:47 am
by arnis
Bigger battery doesn't fix a thing.
Just replace it with cheap appropriate battery.
The cheaper the battery, the better :)

Re: Replace small 12v battery to regular one.

Posted: Sat Jul 07, 2018 7:28 am
by Leaf15
Replaced with exact fit 12V 46Ah 650A Lithium Iron Phosphate Battery LiFePO4 and never looked back. Always 13.35V when parked.

Re: Replace small 12v battery to regular one.

Posted: Sat Jul 07, 2018 12:37 pm
by LeftieBiker
arnis wrote:Bigger battery doesn't fix a thing.
Just replace it with cheap appropriate battery.
The cheaper the battery, the better :)


There is evidence that higher capacity batteries charge better in the Leaf than the OEM size.

Re: Replace small 12v battery to regular one.

Posted: Sat Jul 07, 2018 1:08 pm
by Markokk888
LeftieBiker wrote:
arnis wrote:Bigger battery doesn't fix a thing.
Just replace it with cheap appropriate battery.
The cheaper the battery, the better :)


There is evidence that higher capacity batteries charge better in the Leaf than the OEM size.

Well it's very logical because that small battery always charging when the car is on or at the charging station. So why not have some additional capacity and use it for example for charging a laptop or something like that.. i don't always like to leave my car running when i want to use 12v accessories.. so the additional capacity is very good idea for that.

Re: Replace small 12v battery to regular one.

Posted: Sat Jul 07, 2018 3:13 pm
by LeftieBiker
Markokk888 wrote:
LeftieBiker wrote:
arnis wrote:Bigger battery doesn't fix a thing.
Just replace it with cheap appropriate battery.
The cheaper the battery, the better :)


There is evidence that higher capacity batteries charge better in the Leaf than the OEM size.

Well it's very logical because that small battery always charging when the car is on or at the charging station. So why not have some additional capacity and use it for example for charging a laptop or something like that.. i don't always like to leave my car running when i want to use 12v accessories.. so the additional capacity is very good idea for that.


Actually, it goes more like this: the Leaf stops charging the OEM battery too soon because it reaches the predetermined voltage too quickly, while it is still undercharged. The bigger batteries stay at a lower voltage much longer as they soak up charge, so the car keeps charging them for much longer. We've speculated for years that the Leaf was designed for either a lithium 12 volt battery or an AGM unit, but the company cheaped out when it went into production and just used a small starting battery instead.

Re: Replace small 12v battery to regular one.

Posted: Sun Jul 08, 2018 12:58 am
by arnis
Easy fix is to disconnect current sensor and all you guys will be happy with OEM battery
being heavily charged like with good ol' gasoline car.