Ratchet advice required.

[Buckman]

Be wary about using a different capacity battery to the original - the electronic management on modern cars may get "confused"

Good point. The original specification was "BATTERY - 130 AMP AUXILIARY". Not sure if the vehicle still has the original AUX14 battery or if it was changed at some point in the past 7 years?

 

[Mr Plodd]

A cars electric system might be critical on voltage, but I cannot imagine the batteries capacity (it's amp hour rating) being particularly important.
The charging system senses when the battery is "full" and then cuts it off. It's a bit like a domestic water tank, it matters not if its has a capacity of 10 litres or 1000 litres, when it gets to the preset limit the ball valve shuts off any further input. Same with any battery charging system, if it didn't then our car batteries would all get cooked.
Cranking amperage is important, but a small difference of say 10% is not going to have any serious impact unless you are in an exceedingly cold environment, like the arctic.

 

[Guzzilazz]

A cars electric system might be critical on voltage, but I cannot imagine the batteries capacity (it's amp hour rating) being particularly important.
The charging system senses when the battery is "full" and then cuts it off. It's a bit like a domestic water tank, it matters not if its has a capacity of 10 litres or 1000 litres, when it gets to the preset limit the ball valve shuts off any further input. Same with any battery charging system, if it didn't then our car batteries would all get cooked.
Cranking amperage is important, but a small difference of say 10% is not going to have any serious impact unless you are in an exceedingly cold environment, like the arctic.

Unfortunately, "smart alternators" are programmed to work to a specific AH battery, and won't utilise the benefits of a higher capacity battery...

 

[RogerL]

A cars electric system might be critical on voltage, but I cannot imagine the batteries capacity (it's amp hour rating) being particularly important.
The charging system senses when the battery is "full" and then cuts it off. It's a bit like a domestic water tank, it matters not if its has a capacity of 10 litres or 1000 litres, when it gets to the preset limit the ball valve shuts off any further input. Same with any battery charging system, if it didn't then our car batteries would all get cooked.
Cranking amperage is important, but a small difference of say 10% is not going to have any serious impact unless you are in an exceedingly cold environment, like the arctic.

Modern smart alternators and their associated battery management systems need to know the capacity of a battery as well as it's current state of charge - the basic alternators we had in the 1980s could tolerate change of battery size as you say - but times have changed.

 

[Beardy]

Modern smart alternators and their associated battery management systems need to know the capacity of a battery as well as it's current state of charge - the basic alternators we had in the 1980s could tolerate change of battery size as you say - but times have changed.

Yup, I replaced a battery in a friend's Audi but afterwards he had to take it to be programmed. Apparently the 'brain' had to be told that the battery had been replaced even if the same size was used as the charging system adjusted itself to the battery as it aged over time.

From what I read, not telling it about the new battery could have lead to reduced life expectancy (of the battery).

 

[Buckman]

Tayna have responded and state that there is no difference between AUX14 and their EC131 battery. I have a choice between the more expensive Yuasa and their own brand Enduroline which is cheaper by about £20. They are not sure where they will get the Banner AUX14 batteries in stock again.

The Yuasa has a 1 year warranty and the Enduroline 2 years, but apparently they are both the same and identical battery? The Enduroline is supposed to be a rebranded Yuasa?

 

[otherclive]

There are other Aux14 batteries shown on line including Varta. There are Banner ones too

AUX 14 Banner Running Bull Backup Battery 51400

AUX 14 Banner Running Bull Backup Battery 51400. ML Performanceoffers Free Shipping - next day delivery on in stock 063, 027, 075, 100 batteries e.g. Yuasa, Bosch, Varta & Exide. Cheap prices against Tayna Batteries, Halfords, Euro Car Parts , GSF, Battery Mega Store & Autodoc. Expert advice...

www.mlperformance.co.uk

 

[Buckman]

There are other Aux14 batteries shown on line including Varta. There are Banner ones too

AUX 14 Banner Running Bull Backup Battery 51400

AUX 14 Banner Running Bull Backup Battery 51400. ML Performanceoffers Free Shipping - next day delivery on in stock 063, 027, 075, 100 batteries e.g. Yuasa, Bosch, Varta & Exide. Cheap prices against Tayna Batteries, Halfords, Euro Car Parts , GSF, Battery Mega Store & Autodoc. Expert advice...

www.mlperformance.co.uk

Thanks I am aware of other batteries however my last post was more about Tayna stating that their Enduroline is the same as the Yuasa battery when there is a physical difference in size and also capacities.

Apparently these SS Aux batteries have a short lifetime of about 3 years if used a lot. Most times I remember to switch off the SS when starting off probably why it has lasted so long plus hardly any town driving with the Jeep.

 

[otherclive]

Thanks I am aware of other batteries however my last post was more about Tayna stating that their Enduroline is the same as the Yuasa battery when there is a physical difference in size and also capacities.

Apparently these SS Aux batteries have a short lifetime of about 3 years if used a lot. Most times I remember to switch off the SS when starting off probably why it has lasted so long plus hardly any town driving with the Jeep.

Not sure I’d go with a non known brand that didn’t even say Aux14 on its label, despite what the seller says My experience with that company wasn’t good, so I may be somewhat biased.

 

[Buckman]

Not sure I’d go with a non known brand that didn’t even say Aux14 on its label, despite what the seller says My experience with that company wasn’t good, so I may be somewhat biased.

I agree with you as also had a bad experience a few years ago. If I order it locally the cost is rather high taking into consideration the average cost of the battery.

I would prefer a Bosch AUX14, but does seem to be any available at present. Maybe during the cold snap they sold out of AUX batteries? LOL!

 

[Challenger]

Well clearly you don't know which tools to use. If you did you wouldn't be posing this question! The way to find out what size the nut is, is to try various sizes of spanner or socket, one one them will fit. Probably somewhere between 10 & 14mm. Or even simpler an adjustable spanner! It's a bolt or a nut, they all undo in exactly the same way ( it's anti-clockwise)

Remember - lefty loosy, Righty tighty

 

[Beardy]

Apparently these SS Aux batteries have a short lifetime of about 3 years if used a lot. Most times I remember to switch off the SS when starting off probably why it has lasted so long plus hardly any town driving with the Jeep.

AUX is an abbreviation for Auxiliary. An Auxiliary battery isn't used to start the car (the bigger 'main' battery is used for starting).

When you start your car the main battery voltage will drop to around 10v on a healthy battery - below 9v is a good indication that your battery is on its way out. The problem is that lots of the electronic control systems on modern cars don't like the voltage drop, hence an auxiliary battery is fitted to maintain 12v to the control systems when the car is starting and the main battery voltage drops.