I bought this ( https://uk.rs-online.com/web/p/dc-d-frame-solenoid/1770114/ ) solenoid from RS, and I'm experimenting with it. I attached two 9V batteries in series to it, also in series with a pushbutton switch. It does work -- the plunger pushes forwards -- but it draws such little current that my (old but working) analogue ammeter shows barely any movement. Is this just normal? I can't find any current-related or even voltage-related info in the datasheet. I'm just wondering if there's any way I can get it to be a bit more powerful. Thanks! EDIT: Weirdly when I measured the resistance between the two terminals of the solenoid, the resistance was too high for my meter to measure. What's going on here? From my knowledge of solenoid, it'd just be the two ends of a coil of wire, right?