I have a Turnigy model and I use neodymium magnets to hold the clips onto the ends of the battery (the Turnigy comes with some leads with alligator clips on the end). Magnets stick to batteries pretty well. I only charge one battery at a time, which works fine for me.
HKJ's guide is excellent, so definitely read through it. I've also got some pictures of the magnets in action on this review: