I use a typical 7amp/hour battery like most R/C flyers use, and a power panel. I can usually find power panels at swap meets for 5 or 10 bucks, and get good used batteries where I work. I charge them about once a year. maybe less. I made small box to hold it plus a few tools and some glow plugs, just the minimum I might need at the circle. I make up a set of leads for each style plug connector that is 6 feet long. That way, I set the box beyond my wing tip and behind it when starting. Once the engine is started, I disconnect the clip from the plug and give it a gentle toss toward the box, and it's already outside the circle if I forget to move the box, which I usually do while the engine is warming up. I've worn out two power panels over the last 25 years or so, and just built my second box out of scrap wood from work to replace the original, which was falling apart. With the wire length compensated for by the adjustment knob, I always get good power to the plug, and have never burned one out, and rarely ever adjust it once it's set, unless I bump it accidently. I rarely use and electric starter, but have the capability to use one with this set up, and I can charge other people's single nicad cells off it also. In an event where the battery does die, I have charged it up enough off my car battery witha pair of jumper cable to get me through a flying session. I like the flexablity of this set up and all components are pretty common.
Type at you later,
Dan McEntee