Battery Opinions Please

Discussion in 'Electrics, Lighting, ICE, Security' started by goldeneye243, 30 Nov 2019 at 15:42.

  1. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    I just invested in a BM2 thanks to @Dellmassive and fitted it in the week.

    Tried to start the van this morning and it was dead (nothing to do with the monitor!).

    Rather than call VW assist, I used my GB70 to start it (tnaks again @Dellmassive ) and ran it for two sets of 40 minutes. Voltage is still low.

    charging.jpg

    And yes, it is a Moll battery, but the van does get used for quite a lot of short journeys.

    Thanks :)
     
    Dellmassive likes this.
  2. Pete C

    Pete C T30 102bhp converted to camper VIP Member T6 Guru

    Map
    Get it replaced by VW under warranty.
    Pete
     
    Dellmassive likes this.
  3. Peatey

    Peatey Head Treacle Miner VIP Member T6 Legend

    Map
    If its a Moll its not worth messing about with, just get it changed
     
    Dellmassive likes this.
  4. Dellmassive

    Dellmassive 204 T32 DSG LWB SPORTLINE PV MY18 VCDS User Moderator VIP Member T6 Legend

    Map
    Glad we could help out....

    And as above, get the MOLL battery swapped out. =)

    Also 2x 40min engine runs wont help a flat battery....it will need a proper smart charger on EHU for up to 24hrs.
     
    Last edited: 1 Dec 2019 at 00:09
  5. Dellmassive

    Dellmassive 204 T32 DSG LWB SPORTLINE PV MY18 VCDS User Moderator VIP Member T6 Legend

    Map
    @goldeneye243 how did you get the volatage/time plot above?

    it doesn't look like the normal BM2 screen shot we normally see. (though the data looks the same . . . . i take it the bottom scale is in minutes? 1-600 mins?)
     
  6. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    I used the export function and had a look at it in excel.

    The scale is actually two minute intervals - The excel file isn't the most useful as it is not stored in a decent format. I will spend a bit of time at some point to make a template for it...
     
    Dellmassive and Martinf like this.
  7. Dellmassive

    Dellmassive 204 T32 DSG LWB SPORTLINE PV MY18 VCDS User Moderator VIP Member T6 Legend

    Map
    oh very nice . . . . showing your Excel skills there =]

    the plot above seems to show a resting voltage of about 12.2v . . . . . was this the same time period that the van wouldnt start and you jumped it? . . . . and the 2 40min charge runs?
     
    goldeneye243 likes this.
  8. t0mb0

    t0mb0 Senior Member VIP Member T6 Guru

    I can’t believe VW aren’t recalling these dud Moll batteries as a matter of course, they seem to be causing no end of grief.
     
    Dellmassive and goldeneye243 like this.
  9. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    Yes, the resting voltage was just over 12 volts. The regions at just under 15V are the charging runs.

    I'm going to charge overnight and see what happens in the morning. I have only really had problems starter the van since I put the monitor on. Has anyone had any issues with the BM2 itself? I'm inclined to think it was coincidence but worth asking the question...

    Not sure whether to leave the monitor on or not...
     
    Dellmassive likes this.
  10. Dellmassive

    Dellmassive 204 T32 DSG LWB SPORTLINE PV MY18 VCDS User Moderator VIP Member T6 Legend

    Map
    No issues with any of the 7 I have.....

    The current draw of a BM2 is negligible.
     
  11. Martinf

    Martinf Senior Member VIP Member T6 Pro

    Map
    And how do we do that? I can’t see an export function.
     
    Dellmassive likes this.
  12. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    Last edited: 1 Dec 2019 at 17:04
    Dellmassive and Martinf like this.
  13. mmi

    mmi Senior Member VCDS User VIP Member T6 Guru

    Map
    Hmmm... What happened on 29-Nov at 06:51?
    upload_2019-12-1_20-27-34.png
     
    Dellmassive likes this.
  14. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    Not sure. I was asleep though!

    It dropped out until I had to jump start it...

    Is that normal, or could I have a dodgy unit?
     
    Last edited: 1 Dec 2019 at 19:44
  15. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    How do I tell if the battery needs replacing?

    I don't want to call out VW assist and have them tell me the battery is fine...

    From today - Charged overnight, then a 4o minute drive to work. Sitting during the day, with the doors opened a couple of times to have a look at the van...

    191202%20starter.jpg

    I guess it will be interesting to see what the voltage is in the morning...
     
    Last edited: 2 Dec 2019 at 16:25
  16. goldeneye243

    goldeneye243 Member T6 Pro

    Map
    Bit more battery data plotted -

    191205%20Battery.jpg

    Does anyone happen to know if this is the profile of a defective battery? Would be good to know when it next goes flat and I call VW assist!

    Any starter battery plots would be useful to see...

    Thanks
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice