It is the replacement that is the issue - the first one comes as part of the price you know you are paying for the car. However it would be a good battery that lasted 16 years!. Ten is more realistic (if you don't use a super-fast charger), and of course the warranty is only that it will still hold 70% (e.g.) charge after 8 years, or about 160,000 km (whichever comes first).That's probably true , but anytime after that period you would have to prepare to pay that cost , say you double that and get 16 years it's still costing you $43.50 a week plus power usage charges. It makes me sick when politicians come out and make remarks if people aren't happy with fuel cost then go buy an electric car. Who has 100k to pluck out of their A hole for one and be prepared to possibly fork out another 30k in 8 years if the battery dies.
Ford - 'Your battery is covered for 8 years or 100,000 miles, whichever comes first, retaining a minimum of 70% of its original capacity over that period" The average age of Australian cars is 10 years. And although most private usage will be under 160,000 km (more like 105,000 km average over 8 years), commercial vehicles will typically do that in less than 8 years.
I think some people are in for a shock, and information is not being honestly presented to the public. Nevertheless, I might get a little EV for local commuting, as they are fairly well suited for that, using home solar charging..