/diy/ - Do It Yourself

I got two of these. I'm not too familiar with EDLCs but these seem exceptionally shitty.

What kind of leakage is typical for one of these things? These take forever (literally hours) to get to a reasonably stable voltage on my bench power supply. When they do, they suck like 175mA They also start dropping in voltage, pretty fast, when removed from the power supply.

I charged one up to about 2.5V yesterday, to see what would happen when it left it alone. It dropped quickly from that, eventually slowing to a crawl and more or less stopping at about 1.5V. I haven't tested it properly, but their ESR is also really high. Like somewhere north of 400mΩ.

Does any of this seem at all normal or are these just basically trash?