I have a K1200 LT 2005 and I like to know if the bike came from factory with a Gel battery or Acid.
Check the dealer section of this site. I got a great deal on the Battery Tender Gel .... $49 shipped !®win said:No need for the BMW charger, there are other brands (cheaper). I don't know about your charger. Should be in the manual of the charger if it is suited for gel batteries.