Ideal Amps for bmw battery trickle charger?

Discussion in 'GS Boxers' started by Nath87, Nov 22, 2012.

  1. Nath87

    Nath87 Adventurer

    Feb 8, 2012
    Bedford, NH
    My normal batter charger has a 2amp setting any one know if this is too high for a bmw 11GS battery?
  2. JustKip

    JustKip Long timer

    Apr 28, 2007
    Fresno, CA
    I don't know for sure about the battery in an 1100, but the new (12 ah, 200 cca=smaller?) Yuasa I just put in my 1200 calls for an ideal rate of 1.4 amps. On the box there's charging instructions calling for "1 hour @ 6 amps or 5 hours @1.5 amps "
  3. vintagerider

    vintagerider Long timer

    Nov 20, 2005
    the west
    Your question is a good one. The battery, not the vehicle, determines your choice. Once you have identified the make you will determine the age, the current SOC (state of charge), and the type: AGM, flooded/wet or Gel.

    Next determine if a maintainer or maintainer/conditioner will suffice. Experienced riders don't let their battery discharge so they rarely need a true charger. If a good battery is ridden for several hours then the alternator will charge it up so you only need a maintainer.

    For about $40 you can buy a fully automatic maintainer/conditioner with de-sulfation technology. This advanced technology works either by introducing sweeping high frequency waves or pulses of voltage. Check out Battery Minder #12151. It has advanced full time desulfation with 1.5 amp auto-charge and 5 yr warranty.

    Many 11xx riders like to run Odyssey PC680. If you think that your next battery will be PC680 then you might consider spending a bit more for the required charger. I really don't think you can go wrong with the B-M 12151 though. It is much more advanced than Battery Tender and it is also weather proof. I have not tried it on Odyssey yet but plan to.