12V battery life

  • I had no guarantee on my HV battery and I change the 12v battery after about six years, but I do check it every few months. IMO changing the 12v battery every three years is expensive overkill, but I guess if you sleep better at night, that's something to consider.


    2014 EV Coupe 22,500 miles

    2014 EV Cabriolet 24,000 miles

    2015 EV Coupe 22 000 miles


    2014 EV Coupe 22,000 miles

    2014 EV Cabriolet 23,000 miles

    2015 EV Coupe 21,000 miles

  • My 12v battery failed on me after about 4 years. Was rather inconvenient, as I had to replan a whole day and move all appointments. So I rather have it replaced by the service than by surprise.

    But I also do think smart should simply use 12 v batteries which are meant for EVs. This way they would last at least as long as the HV battery and they wouldn't have to replace them. Right now they use the same battery as they used in the petrol cars. Which simply aren't made for the EV use-case.

    smart fortwo Coupé 451er ED 3,7kW-Lader, 05/2013; > 250.000km (bei 250.000 km 22 kW nachgerüstet)

    smart fortwo Coupé 453er EQ 22kW-Lader, 05/2018 - 05/2021; 109.000km

    smart fortwo Cabrio 453er EQ 22kW-Lader, EZ 04/2021; > 15.000 km

    "Aus Gaspedal wird Spaßpedal"

    - Smart

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