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How long are your start/stop AGM batteries lasting?

  • 27-07-2020 11:18PM
    #1
    Micky 32
    Registered Users, Registered Users 2 Posts: 6,647 ✭✭✭


    How many years have any of you gotten out of them? I hear because of the brake recupperation and start/stop they don't last very long, 3/4 years despite them being "tougher" AGM batteries.


    I put one of those conductance testers on my battery, a 171 car. SOH is now down to 50-60% health. Rated EN 680A ( now reading approx 500A)


    For comparison i put the tester on a brand new battery in a friends new car, same battery specs and it reads 100% SOH rated (680 A) reading 750A.



    Funny thing start stop works perfectly and seems to work fine.


Comments

  • #2
    i57dwun4yb1pt8
    Closed Accounts Posts: 2,655 ✭✭✭i57dwun4yb1pt8


    just replaced mine at 5 years , 250 f*cking quid


  • #3
    Gumbo
    Moderators, Society & Culture Moderators Posts: 42,150 Mod ✭✭✭✭Gumbo


    2013 520d here still on original battery.
    Also 2014 520d still on original battery.


  • #4
    Stoolbend
    Registered Users, Registered Users 2 Posts: 1,287 ✭✭✭Stoolbend


    Gumbo wrote: »
    2013 520d here still on original battery.
    Also 2014 520d still on original battery.

    This is the exception to the rule in my experience. 4 to 5 years is when we would have seen issues with lazy starting and stop-start.

    Twice the price and last half as long!


  • #5
    zilog_jones
    Registered Users, Registered Users 2 Posts: 5,723 ✭✭✭zilog_jones


    Mine's still the original from late 2012 in my Prius. It doesn't do any engine starting though, as the high voltage system handles that.

    I did keep it on a smart charger during lockdown as I was barely driving at all.


  • #6
    Gumbo
    Moderators, Society & Culture Moderators Posts: 42,150 Mod ✭✭✭✭Gumbo


    Stoolbend wrote: »
    This is the exception to the rule in my experience. 4 to 5 years is when we would have seen issues with lazy starting and stop-start.

    Twice the price and last half as long!

    Funny enough, our 535d (2015) is still on original battery too.


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  • #7
    Micky 32
    Registered Users, Registered Users 2 Posts: 6,647 ✭✭✭Micky 32


    Gumbo wrote: »
    Funny enough, our 535d (2015) is still on original battery too.

    We still have an old VW Passat 2007 around the house still on original battery, granted isn’t start stop.


  • #8
    PaulKK
    Registered Users, Registered Users 2 Posts: 2,263 ✭✭✭PaulKK


    Our 162 Skoda Octavia battery failed last winter, just over 3 years old.

    On a Sunday, parked in a multi storey carpark.

    The car is supposed to be recoded too, but I just got one in Halfords, swapped it out and it did the trick.


  • #9
    Cee-Jay-Cee
    Registered Users, Registered Users 2 Posts: 12,234 ✭✭✭✭Cee-Jay-Cee


    I changed the original battery in my wifes 2010 Auris in 2018 at 120k kms. The new batter was €120 so if it lasted 8 years like the original then its not too bad.


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