Andrew Gibbs publishes a free newsletter and some extremely good guides on electric power. A couple of years ago these were available in paper form, but now they are e-books only-well, really PDFs that can be downloaded from his website. I highly recommend Gibbs Guide #1 Mastering Motors if you are mystified by electric power. This does not specifically cover the smaller pager motor systems, but the principles still apply. He will be coming out with another guide expressly covering these smaller systems. His guide to Lithium Polymer Batteries is a must read if you use them and we all do. He explains in plain English how you need to treat them and why.
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