Hopped on my K1200LT for my usual Saturday morning ride with my buddies and the battery was dead. Right before I tried to start it, I noticed I did not have the ignition switch turned all the way to the left as the handlebars were not locked. Instrument lights were barely glowing. I have a radar detector plugged into the leads that used to go to the map light on the dash, and maybe that is what drained the bike after about 5 days of not running. Not wanting to be late, I just grabbed my 30 year old car 10 AMP battery charger and hooked it right up to the battery terminals without disconnecting anything. Let it charge at a variable 5-10 AMPS for a few minutes, but did not get enough charge to start. After a few more minutes at 10 AMPS, the bike started, I disconnected the charger from the battery and rode off. Bike ran fine for the rest of the day. I'll check to see if it starts tomorrow. Just thought I would post so that it may be an option for you to consider should the same thing happen to you. I think I have also jump started from a car and may have push started when the battery was too low to use the electric starter.