So, I've been doing a lot of spot welding and research/development of this manufacturing process I came up with a while ago, both of which involve high-energy capacitor discharges, and my previous 2.3kJ capacitor bank just wasn't cutting it anymore. So, I invested in 100 "Green-Cap" 2.7v 100F supercapacitors made by a company called Samwha. I spent the last two days soldering 74 of them in series to create the equivalent of a 200v 1.351 F capacitor, which according to my math, should be able to store about 27kJ of energy. Which is why I was shocked when I tested it for the first time only minutes ago. Oddly enough, using only my 200W power supply, it charged to 200 v one or two seconds when it theoretically should have taken 135 seconds. Then, when I discharged it, the spark was so tiny, it didn't even make a noise. I've played with 50J camera capacitors that had more of a bang than this thing. I must have checked 8 or 9 times, but, no, the polarity is correct, and the circuit is not shorted anywhere. What could cause this? What massive, fundamental error have I must have committed for my math to be 3-4 magnitudes off? Or did the semi-anonymous chinese dude who sold me these give me a box of lemons? Or could Samwha be guilty of false advertising? What is it? What could it be? I'm completely stumped here.