Battery or Tender? | FerrariChat

Battery or Tender?

Discussion in '458 Italia/488/F8' started by Mwilaski, Jan 15, 2024.

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  1. Mwilaski

    Mwilaski Rookie

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    I've read all the battery/tender posts here and am still confused by a problem I'm having. My 458 Italia sat on the charger in my garage for a while (2-3 months, I was traveling). When I returned, the car was completely dead and the tender looks like the attached image. It starts as solid green, then that light eventually starts blinking green, but none of the top lights are coming on. I have double checked that connections to the wall and to the tender port in the car are in-tact.

    I live in a very remote area far from a Ferrari dealer, so I am trying to self diagnose/fix this issue if possible. My question is - how can I determine if I need a new tender, a new battery, or have some other problem alltogether?

    Thanks so much and sorry for yet another battery post!
     

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  2. PMiranda

    PMiranda Formula Junior

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    You could try using a different battery tender for a couple days and see if that makes a difference. Cheap to mail order one from Amazon and it'll come in handy for other vehicles
     
  3. Eric C

    Eric C F1 World Champ Silver Subscribed

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    And another
     
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  4. flash32

    flash32 F1 Veteran

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    Agreed

    Buy a Ctek mxs 5.0 which is the same as what you have .. try it directly on battery ..if it charges fine you can swap the magnetic head from your charger to the Ctek by sacrificing the battery loop leads that come with tender or you can buy an adapter (very over priced)

    If you don't want to buy anything first ..you will have to pierce the wires and run the leads to another good battery and see if this charger works

    Sent from my moto g power using Tapatalk
     
  5. Mrpseudonym

    Mrpseudonym Formula Junior Silver Subscribed

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    No lights on tender normally means there is no connection to battery
     
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  6. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    The simplest thing is to put a direct pigtail with a SAE terminal on the battery terminals and leave it outside of the battery box. No BS intermittent connections etc. There are better chargers than the CTEK. I don't know why everybody is all wrapped up with CTEK. But if you are willing to do that your charging problems will be over. Also Get a bluetooth battery monitor and attach that while connecting the pigtail. I find after much experimentation and trial that the yellow Granite Battery Saver charger works the best of any. It comes with all the necessary pigtails. This thing does everything and with a monitor you can follow the charging status . desulfation mode, voltage, starting voltage drop etc.

    https://www.amazon.com/Battery-Saver-2365-lcd-Charger-Maintainer/dp/B075NWPZ2B

    https://www.amazon.com/QUICKLYNKS-Battery-Monitor-Bluetooth-Device/dp/B01MT4583U/ref=sr_1_5?keywords=bluetooth%2Bbattery%2Bmonitor&qid=1705417061&sr=8-5&th=1
     
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  7. Mwilaski

    Mwilaski Rookie

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    Great, I just ordered both and will report back on how it goes. Thank you!
     
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  8. flash32

    flash32 F1 Veteran

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    I have a few of both .. the one you mentioned and the ctek 5.0 i mentioned above .. never had any issues .
    The reason I like the ctek 5.0 is becuase it is basically the factor charger without "ferrari" on it ..especially in the case of a 458
    I am sure either would be fine
    The CTek got a bad rep with the older models including the ones ferrari used on the early 430s etc
     
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  9. Mwilaski

    Mwilaski Rookie

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    Hi - so I got the Battery Saver, and I didn't have a socket wrench to allow me to hook up the pigtails tonight, so I tried it with the spring clamps. Nothing seems to be happening, so I'm wondering if I either did this wrong, or if the battery is totally shot? Images attached.
     

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  10. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    Do you have an electrical voltmeter? If so take the reading directly from the positive and negative terminal. It look like the unit is not sensing any voltage. Is the cable seated completely in its adapter? Is there metal to metal contact of alligator clips to terminals? The plastic shields may be preventing contact. If you have a vom see what resting voltage is. If zero it may not try to charge battery as it senses no voltage of polarity. Strange.
     
  11. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    If zero voltage then battery is shot. What does the manual say about completely discharged batteries? It may be the type that won’t charge a completely flat battery. I don’t have a manual handy just yet.
     
  12. Mwilaski

    Mwilaski Rookie

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    The manual says if it reads anything less than 10 volts, to leave it on for up to a week. It says the lower the number the less likely it'll revive, but I guess I will let it sit a bit and see what happens before I order a new battery.
     
  13. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    Do you have an old fashioned charger like a Schauer ?sp or harbor freight transformer charger? They will charge or at least apply a charging current to the flat battery. If the battery is as flat as it appears it is probably damaged beyond any trustworthy recovery. What voltage do you get with a stand alone vom?
     
  14. Mwilaski

    Mwilaski Rookie

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    Ok here is the latest - I left the clamps on overnight, and this morning I see some signs of life (attached). However, when I disconnected the clamps/re-hooked up the quick release negative terminal and put the key into the car, nothing happens. Any ideas for what next? Again, thank you so much! Amazing to have a community like this to help.
    Image Unavailable, Please Login
     
  15. flash32

    flash32 F1 Veteran

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    7.2 bolts is too low
    . Seems like your battery is toast
    If you want continue to charge until you see 13 plus volts and see if battery hold charge

    Sent from my moto g power using Tapatalk
     
  16. Mwilaski

    Mwilaski Rookie

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    Understood, will do.
     
  17. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    7.2 volts is a dead battery. It probably has a shorted cell in it that caused a self discharge and killed the battery. Car won’t recognize or respond to that voltage snd you shouldn’t be even trying anything with the key starting etc on the car as the low voltage can seriously screw up the electronics, instrument cluster etc. this battery is toast as Dom also states. Quit wasting your time and get new one ASAP group H6 charge it up fully with the new charger then put it in car. Leave doors ajar so windows don’t bind and open frunk if you need to get in. I hope you electronics aren’t harmed. I lost a cluster on 430 when mechanic tried to start car with a partially charged battery.
     
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  18. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    The charger probably thinks it has charged a 6V battery to 7.2 and shows 100 percent charge. Dead cell internally shorted cell. What is the history of this battery you have? It probably has been deeply discharged before then sat in that state for a long time thus shorting and sulphating it beyond recovery. Start with a new one and keep it on tender at all time when not using and you will know the history. Also install a Bluetooth battery monitor as I have previously suggested. Let us know how it goes. When you get a new battery ,I would avoid an Optima spiral wound type as there have been a lot of quality issues with them. I you can get an Oddesy battery I think they are top
    Notch. Other AGM H6 are fine also. JMHO.
     
    Last edited: Jan 24, 2024
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  19. flash32

    flash32 F1 Veteran

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    i am having good experience with Duracell AGM 34r lately
     
  20. Mwilaski

    Mwilaski Rookie

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  21. Pat488

    Pat488 Karting

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    Any lead acid battery (flooded, AGM, GEL, etc.) that has been taken down to zero volts, as this one has, is junk. There’s no fixing that battery, no matter what you try. Replace it. Then confirm that your battery tender is working correctly as it should have prevented the battery from getting down to zero volts.
     
  22. Snapshift

    Snapshift Formula Junior Rossa Subscribed

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    Yes that would be a great battery. Also check out their extreme series. Where are you located? Napa stores may carry this line also. If you are ordering from Amazon throw in a Bluetooth battery monitor with the order and you’ll be good to go. Charge it up fully with the battery saver you have and attach the minder to it while charging and w at h what is happening during the charging cycles. You will have to download a program for your phone to use the Bluetooth monitor. I posted the link in the earlier posts in this thread. Also look for my posts in another thread that show the graphical interface with all charging parameters.
     
    Last edited: Jan 24, 2024
  23. collegeboy

    collegeboy Formula 3

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    Buy a new battery.
     
  24. mdrums

    mdrums F1 Rookie

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    Ive had really good luck with Interstate Batteries in my past Porsche's, My 488 and now my F8. I also drive my car every week or 2 and keep it on the stock Ferrari tender. My 488 got a new Interstate battery in spring 2021 and when I sold it May 2024 the battery was still in spec no issues.
     
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