Altransit wrote:loot wrote:Altransit will suggest the batteries Ford fits are silver calcium and not good for stop start, which too may be another valid point
What I've noted, from reading up on the subject, is that you really need AGM, or at least EFB, batteries for stop-start to work properly, because they're better able to maintain full starting current, even when partially discharged.
Having said all that, I duly fitted a brand new EFB battery in the Focus, to see if the stop-start would start working more reliably than it had, with the Silver Calcium battery that I had previously fitted. I would have fitted the superior AGM battery, but not only are they more than double the price of an EFB battery, but they don't come in the correct size to fit the battery tray
Any road up, even with the new and correct battery fitted, it still hardly ever works
Thanks for the reply, If my battery is only keeping upto 12v of charge will removing it and trickle charging it over night bump it up or is it knackered? its probably the original battery so its 6 years old now. If Stop/Start saves around 5% diesel then over a year it will pay for itself with the mileage I do.