I disagree with you. The first picture that Jan show us, will cost $2 US maximum. These electronic components, like resisters, leds, capacitors are really cheap. Of course, if you dont have a soldering iron, and this stuff, will increase the cost. But actually im a electronic engineer student, and i can have all these components for free. And.... im from Portugal. Shipping cost from towerhobbies is about $15US dolars, and will take more than a month to be here [] That's why i really want to build one myself. Ive seen on the web lots of battery testers/indicators, but all uses OPAMP, and/or complex circuits[] That's why it would be really nice to have jan's battery indicator plans. I tryed to discover the plans from the picture, but hidden components still a mystery[]