[Captjack]

Well after nearly 70000 miles and five and a half years the battery has decided it’s time to retire. What’s the best battery to go for, best place, cost, and will it fit in the tray, is it easy to get the battery out, looks quite tight in the tray. Also will disconnecting the battery affect the Mountune map, or anything else for that matter? Thanks

 

[the radman]

i used a varta one,the halfords one that is supposed to be correct is actually longer and and not as high as the orig,there is a spacer in the battery box which can be removed to allow a longer battery to fit but with it being lower the clamp on the top did nothing so i thought rather than mess around trying to pack it out ill find one thats actually the correct size,which was a varta E39

 

[Captjack]

Cheers thanks for the information.

 

[the radman]

going off the orig one,it looks like this is slightly more powerful too,im sure someone will confirm

 

[Graham]

There’s a how to guide here Changing the Battery : How to

I went for a Bosch myself

 

[Captjack]

Been looking at Varta’s website and their not showing an E39 only and E38, price £79.99, does anybody know if that the right one?

 

[notesbloke]

Hi mate,
Is this the correct one?

E39 Varta Start-Stop Plus 096 AGM Car Battery 12V 70Ah (570901076)

VARTA START-STOP PLUS WITH AGM TECHNOLOGY VARTA Start-Stop Plus batteries are the perfect solution for vehicles featuring advanced Start-Stop technology with regenerative braking and additional fuel-saving technologies. Only the specially developed VARTA Start-Stop Plus batteries with AGM...

www.tayna.co.uk

John

 

[Captjack]

Cheers, that’s the one👍

 

[Graham]

Just fyi, as per the link I posted above the OEM battery is an EFB and not AGM. The reason is because AGM batteries do not live long in hot conditions (like engine bays). Generally manufacturers specifying AGM batteries put the battery tray elsewhere like the boot compartment.

 

[the radman]

this is worth a read through,long gone are the days when a battery was just a battery and cost about
£35 i used the varta mainly because the size was spot on,as for how long it would last i cant help as i no longer have the car EFB or AGM – Which battery do I need? (varta-automotive.com)

 

[Vorgem]

In my own experiance an EGM battery with simple stop / start lasts many more years than an AGM battery in more complex start / stop systems. I have had AGM batteries from new under the bonnet like in the VW Caravelle as well as in the boot. The EGM battery in the RS has lasted over five years while two to three was typical for the AGM batteries. The Varta article in the link does say 'Batteries with modern technologies such as EFB and AGM are monitored by a battery sensor and are closely linked with the battery management system (BMS).' and the RS battery monitoring and charging control system does seem to be fussy about the battery.
I will be sticking with an EGM for the RS.

 

[the radman]

just out of interest has anyone ever priced up a genuine one from ford?

 

[paulthemilk]

Wow I'm still going strong on the original 😂 anyone else?

 

[Captjack]

I work in West Wales, live in Dorset, asked the local boys and they said try this small outfit in Haverford West, phoned the place up, yes we have four in stock, great can I come and pick it up, any chance you do fitting, yes we do, off I went, a Varta EGM fitted, took 20 minutes. I expected a biggish bill, all in including fitting £97, 2 year guarantee. Well pleased.

 

[the radman]

thats cheap,i paid £130 just for the battery itself