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Thread: Battery Float charge

  1. #1
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    Battery Float charge

    First i admit I an new to the forum and BMW motorbikes. I have just purchased a new 1250GS. Whenever I finish a ride I always like to put the battery on float charge. I have read in the Riders Manual page 195 Notice at the bottom of the page states the motorcycle on board electrics know when the battery is fully charged. The on board socket is switched off when fully charged. I measured using a dummy socket and the battery is 11.75 V but plugging in a oxford Optimiser 900 it shows 0 volts 0 amps . Is this a problem with the charger or at what voltage does to batter drop to require a charge. All help appreciated

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    How was the dummy socket wired?

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    Ride, park ,ride, park, ride, park,ride, park, ride, park,ride, park, ride, park,ride, park, ride, park

    Do you see a pattern here

    if you ride it enough, you shouldn't need to go anywhere near a charger

    I bought cheap battery's for the hexhead, it bit me on the bum ...

    Went to motobatt and never looked back

    My Yuasa in my new LC went flat even though it was started an run through the lock down ...

    it now has a new motobatt in it

  4. #4
    https://www.youtube.com/watch?v=pQOHsLfcd0A
    I think it will help you. If there's a triangle, red warning light, then, connection polarity is incorrect and 0 volts -- 0 amps will show up on screen. Double check if you did a right connection and check if connection polarity is ok.

  5. #5
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    I know nothing about the Oximiser 900. Does it claim that it is compatible with the BMW Can-Bus sockets in the same way that some of the Optimate chargers?

    The BMW manual will certainly assume that one is using a BMW charger.
    John Bentall

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    If the Oximiser came with battery pig-tails - fit them and cabletie the tail to the frame.

    Just plug in the charger direct to the battery.
    If I am ever on life support - Unplug me......
    Then plug me back in..........

    See if that works .....

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    Santa Thank you for your help it has been most valuable (yes this is sarcasm)

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    Quote Originally Posted by resovoir View Post
    Santa Thank you for your help it has been most valuable (yes this is sarcasm)
    Bring it on it's fine... but do you see where i'm coming from .... just ride it man! stop worrying about it,

  9. #9
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    Quote Originally Posted by resovoir View Post
    First i admit I an new to the forum and BMW motorbikes. I have just purchased a new 1250GS. Whenever I finish a ride I always like to put the battery on float charge. I have read in the Riders Manual page 195 Notice at the bottom of the page states the motorcycle on board electrics know when the battery is fully charged. The on board socket is switched off when fully charged. I measured using a dummy socket and the battery is 11.75 V but plugging in a oxford Optimiser 900 it shows 0 volts 0 amps . Is this a problem with the charger or at what voltage does to batter drop to require a charge. All help appreciated
    The Oxford charger isn't a CAN-BUS charger. For that charger you'll need to connect directly to the battery. Not through the DIN socket.

  10. #10
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    Quote Originally Posted by Blackal View Post
    If the Oximiser came with battery pig-tails - fit them and cabletie the tail to the frame.

    Just plug in the charger direct to the battery.
    If you carry a compressor fit it with the compatible plug for the pig tail.... one lead, two solutions

  11. #11
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    Get a Ctek comfort charging lead, wire it perm to battery, gives traffic light indication of battery status, buy a Ctek extension lead and snip off the plug and splice it to your charger of choice.
    Jobs a goodun

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    thanks

    thanks that has clarified the situation

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    Quote Originally Posted by Popell View Post
    Get a Ctek comfort charging lead, wire it perm to battery, gives traffic light indication of battery status, buy a Ctek extension lead and snip off the plug and splice it to your charger of choice.
    Jobs a goodun
    I did this and fitted a plug to my airman compressor.

  14. #14
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    I have never ever put one of my bikes on charge as a routine. Ever. Only when the battery starts playing up due to age, I might end up getting the charger out.

    Saying this, the longest the bike ever goes without being ridden is 3wks, occasionally. Do you leave it's for months without using it? I imagine that might be where meeting it's plugged in has a place. Otherwise I'd just leave it and err...as mentioned above, ride and enjoy it.

    Sent from my SM-G975F using Tapatalk

  15. #15
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    Quote Originally Posted by Santa-2512 View Post
    Bring it on it's fine... but do you see where i'm coming from .... just ride it man! stop worrying about it,
    Worry? ignorance?

    You know that there is a difference.
    Brian




    GSA Triple Black
    VW Crafter camper
    Zagato Guzzi 950 cafe
    Ducati 996R



    You may say I'm a dreamer, but I'm not the only one

  16. #16
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    Quote Originally Posted by Oldrat View Post
    Worry? ignorance?

    You know that there is a difference.
    Indeed,

    But getting the bike out in the morning turning on the ignition and pressing the start button isn't ignorance, and could also be argued isn't worrying

    Its either going to start or it isn't , either way a solution is available..

    On the other hand checking the voltage and keeping it topped up , is worrying..

    Now it is worrying unnecessarily? or worrying that your that concerned that the battery will fail overnight??


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