when my dad bought his first slow stick, it came with a converted pc power supply to power the dc charger for his nicads. it had a power pole connector on the charger which we just stuck some alligator clips to our charger. well, my dad has gotten his second rep rap going now and wanted "his" power supply back, so I had to come up with a new one.
just for fun I was browsing specs on chargers online when I realized my charger is rated for 11-18v's input. I realized I have quite a few old laptop power supplies and decided to go through them to see if I could come up with a 50-75watt brick to make an adapter and charge with. found an old ibm brick rated at 16v's and 4.5 amps.
brought it out to my soldering station thinking I would have to make a plug or adapter and compared it to the alligator clipped one we have been using, and it looks identical. plugged it in on a dead 3 cell, and its charging at 4.2 amps supplying proper voltage.
now I have a charging lead I can bring with me to the field if I ever decide to fly more then a couple batteries I can clip right to my car battery without messing with anything else. and, it was free. I happen to have 7 identical power bricks for laptops that have been discarded.